056
FPUS55 KTFX 180633
ZFPTFX
ZONE FORECAST PRODUCT FOR CENTRAL AND SOUTHWEST MONTANA
NATIONAL WEATHER SERVICE GREAT FALLS MT
1232 AM MDT TUE AUG 18 2026
SPOT TEMPERATURES AND PROBABILITIES OF MEASURABLE PRECIPITATION
ARE FOR .TONIGHT THROUGH TODAY..., WEDNESDAY, WEDNESDAY NIGHT,
AND THURSDAY.
MTZ301-191000-
EAST GLACIER PARK REGION-
INCLUDING THE CITIES OF EAST GLACIER PARK, KIOWA, BABB,
SAINT MARY, MARIAS PASS, AND LOGAN PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. PATCHY SMOKE. PATCHY SMOKE AFTER MIDNIGHT. HIGHS
62 TO 72. LOWS 48 TO 53. SOUTHWEST WINDS UP TO 15 MPH WITH GUSTS
TO AROUND 30 MPH.
WEDNESDAY
MOSTLY SUNNY. PATCHY SMOKE. HIGHS 65 TO 75. WEST
WINDS 5 TO 15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. PATCHY SMOKE IN THE EVENING.
LOWS IN THE LOWER 50S. SOUTHWEST WINDS 5 TO 10 MPH. GUSTS UP TO
25 MPH IN THE EVENING.
THURSDAY
SUNNY. HIGHS 65 TO 73. NORTHWEST WINDS UP TO 10 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 50. EAST WINDS 5 TO
10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS 69 TO 77.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY CLOUDY
WITH A 20 PERCENT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN
THE MID 50S.
SATURDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS IN THE MORNING,
THEN CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 65 TO 75. CHANCE OF PRECIPITATION
40 PERCENT.
SATURDAY NIGHT
PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. LOWS AROUND 50. CHANCE OF PRECIPITATION 20 PERCENT.
SUNDAY
SUNNY WITH A 20 PERCENT CHANCE OF RAIN SHOWERS. HIGHS
58 TO 68.
SUNDAY NIGHT THROUGH MONDAY NIGHT
MOSTLY CLEAR. LOWS IN THE
UPPER 40S. HIGHS 62 TO 72.
TUESDAY
MOSTLY SUNNY. HIGHS 65 TO 75.
MTZ307-191000-
SOUTHERN ROCKY MOUNTAIN FRONT-
INCLUDING THE CITY OF ROGERS PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 64 TO 74. LOWS 46 TO 52. WEST WINDS UP TO
15 MPH WITH GUSTS TO AROUND 30 MPH.
WEDNESDAY
SUNNY. PATCHY SMOKE IN THE AFTERNOON. HIGHS 67 TO
77. WEST WINDS 5 TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 47 TO 53. WEST WINDS UP TO
10 MPH. GUSTS UP TO 25 MPH IN THE EVENING.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS 69 TO 79. LOWS
48 TO 54. WEST WINDS UP TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS 70 TO 80.
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
LOWS 52 TO 58. CHANCE OF PRECIPITATION 20 PERCENT.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS 68 TO 78. CHANCE OF
PRECIPITATION 40 PERCENT.
SATURDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING. LOWS 47 TO 53.
SUNDAY THROUGH MONDAY NIGHT
MOSTLY CLEAR. HIGHS 63 TO 76. LOWS
IN THE UPPER 40S.
TUESDAY
SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS 68 TO 78.
MTZ302-191000-
NORTHERN HIGH PLAINS-
INCLUDING THE CITIES OF BROWNING, HEART BUTTE, AND DUPUYER
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. PATCHY SMOKE. SLIGHT CHANCE OF RAIN SHOWERS LATE
IN THE EVENING. PATCHY SMOKE EARLY IN THE MORNING. HIGHS IN THE
MID 70S. LOWS 49 TO 55. WEST WINDS UP TO 15 MPH WITH GUSTS TO
AROUND 30 MPH.
WEDNESDAY
MOSTLY SUNNY. PATCHY SMOKE THROUGH THE DAY. HIGHS IN
THE UPPER 70S. WEST WINDS 10 TO 15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S. WEST
WINDS 5 TO 10 MPH. GUSTS UP TO 25 MPH IN THE EVENING.
THURSDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH SHIFTING TO THE NORTH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 50S. NORTHEAST
WINDS 5 TO 10 MPH SHIFTING TO THE WEST AFTER MIDNIGHT.
FRIDAY
SUNNY. HIGHS IN THE UPPER 70S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY CLOUDY
WITH A 20 PERCENT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN
THE MID 50S.
SATURDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS IN THE MORNING,
THEN SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN
THE UPPER 70S. CHANCE OF PRECIPITATION 40 PERCENT.
SATURDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 50S.
SUNDAY THROUGH MONDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE MID
70S. LOWS AROUND 50.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S.
MTZ308-191000-
SOUTHERN HIGH PLAINS-
INCLUDING THE CITIES OF BYNUM, CHOTEAU, AND PENDROY
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PATCHY SMOKE AFTER MIDNIGHT. SLIGHT CHANCE OF
RAIN SHOWERS EARLY IN THE AFTERNOON, THEN SLIGHT CHANCE OF RAIN
SHOWERS IN THE EVENING. PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 70S. LOWS 50 TO 55. WEST WINDS
UP TO 15 MPH.
WEDNESDAY
SUNNY. PATCHY SMOKE. HIGHS IN THE LOWER 80S. WEST
WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. PATCHY SMOKE IN THE EVENING.
LOWS IN THE LOWER 50S. WEST WINDS UP TO 10 MPH.
THURSDAY
SUNNY. HIGHS IN THE LOWER 80S. WEST WINDS UP TO
10 MPH SHIFTING TO THE NORTH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. NORTHEAST
WINDS 5 TO 10 MPH SHIFTING TO THE NORTHWEST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLOUDY. A 20 PERCENT CHANCE
OF THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE LOWER 80S.
SATURDAY NIGHT
PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF PRECIPITATION
20 PERCENT.
SUNDAY THROUGH MONDAY NIGHT
MOSTLY CLEAR. HIGHS AROUND 80.
LOWS IN THE LOWER 50S.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
MTZ303-191000-
EASTERN GLACIER, WESTERN TOOLE, AND CENTRAL PONDERA-
INCLUDING THE CITIES OF CUT BANK, ETHRIDGE, AND SANTA RITA
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. PATCHY SMOKE. SLIGHT CHANCE OF RAIN SHOWERS EARLY
IN THE EVENING. PATCHY SMOKE EARLY IN THE MORNING. HIGHS IN THE
UPPER 70S. LOWS 48 TO 55. WEST WINDS UP TO 15 MPH WITH GUSTS TO
AROUND 30 MPH.
WEDNESDAY
MOSTLY SUNNY. PATCHY SMOKE. HIGHS IN THE LOWER 80S.
WEST WINDS 5 TO 15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S. WEST
WINDS UP TO 10 MPH.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE UPPER
70S. LOWS IN THE LOWER 50S. NORTH WINDS UP TO 15 MPH.
FRIDAY
SUNNY. HIGHS IN THE LOWER 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY CLOUDY
WITH A 20 PERCENT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN
THE MID 50S.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
HIGHS IN THE LOWER 80S. CHANCE OF PRECIPITATION 20 PERCENT.
SATURDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 50S.
SUNDAY THROUGH MONDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE UPPER
70S. LOWS IN THE LOWER 50S.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
TEMPERATURE / PRECIPITATION
CUT BANK 50 82 52 77 / 20 0 0 0
MTZ304-191000-
EASTERN TOOLE AND LIBERTY-
INCLUDING THE CITIES OF DEVON, SHELBY, CHESTER, GALATA, JOPLIN,
LOTHAIR, AND WHITLASH
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PATCHY SMOKE. SLIGHT CHANCE OF RAIN SHOWERS
EARLY IN THE AFTERNOON, THEN SLIGHT CHANCE OF RAIN SHOWERS IN THE
EVENING. PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF THUNDERSTORMS.
HIGHS IN THE LOWER 80S. LOWS 50 TO 56. WEST WINDS UP TO 10 MPH
WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
MOSTLY SUNNY. PATCHY SMOKE IN THE MORNING. HIGHS
80 TO 86. WEST WINDS 5 TO 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTHWEST
WINDS UP TO 10 MPH SHIFTING TO THE EAST AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 77 TO 83. NORTH WINDS UP TO 10 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. NORTHEAST
WINDS 5 TO 10 MPH.
FRIDAY
SUNNY. HIGHS IN THE LOWER 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY CLOUDY
WITH A 20 PERCENT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN
THE UPPER 50S.
SATURDAY
PARTLY SUNNY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 80 TO 86.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF PRECIPITATION
30 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
MORNING. HIGHS 76 TO 82.
SUNDAY NIGHT THROUGH MONDAY NIGHT
MOSTLY CLEAR. LOWS IN THE
MID 50S. HIGHS IN THE LOWER 80S.
TUESDAY
MOSTLY SUNNY. HIGHS 81 TO 87.
MTZ305-191000-
HILL COUNTY-
INCLUDING THE CITY OF HAVRE
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. SLIGHT CHANCE OF RAIN SHOWERS EARLY IN THE
AFTERNOON. PATCHY SMOKE, THEN SLIGHT CHANCE OF RAIN SHOWERS EARLY
IN THE EVENING. HIGHS IN THE LOWER 80S. LOWS 50 TO 55. SOUTHWEST
WINDS UP TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 80S. WEST WINDS 5 TO
10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTHWEST
WINDS UP TO 10 MPH SHIFTING TO THE NORTHEAST AFTER MIDNIGHT.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE LOWER
80S. LOWS IN THE MID 50S. NORTHEAST WINDS UP TO 15 MPH.
FRIDAY
SUNNY. HIGHS IN THE MID 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. LOWS IN THE UPPER 50S.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
HIGHS IN THE UPPER 80S. CHANCE OF PRECIPITATION 20 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
WITH SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN THE
MID 50S. CHANCE OF PRECIPITATION 30 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
MORNING. HIGHS IN THE LOWER 80S.
SUNDAY NIGHT THROUGH MONDAY NIGHT
MOSTLY CLEAR. LOWS IN THE
MID 50S. HIGHS IN THE LOWER 80S.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
TEMPERATURE / PRECIPITATION
HAVRE 53 87 55 87 / 20 0 0 0
MTZ306-191000-
NORTHERN BLAINE COUNTY-
INCLUDING THE CITIES OF CHINOOK, ZURICH, HARLEM, HOGELAND,
AND FORT BELKNAP
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. SLIGHT CHANCE OF RAIN SHOWERS EARLY IN THE
AFTERNOON. PATCHY SMOKE. HIGHS IN THE LOWER 80S. LOWS 49 TO 55.
SOUTHWEST WINDS UP TO 10 MPH.
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 80S. WEST WINDS 5 TO
15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTHWEST
WINDS 5 TO 10 MPH SHIFTING TO THE EAST AFTER MIDNIGHT.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE MID
80S. LOWS IN THE MID 50S. EAST WINDS UP TO 15 MPH.
FRIDAY
SUNNY. HIGHS IN THE MID 80S.
FRIDAY NIGHT
MOSTLY CLEAR IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. LOWS IN THE UPPER 50S.
SATURDAY
BREEZY. PARTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE MORNING. HIGHS IN THE UPPER 80S.
SATURDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE
OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF
PRECIPITATION 40 PERCENT.
SUNDAY THROUGH TUESDAY
MOSTLY CLEAR. HIGHS IN THE MID 80S.
LOWS IN THE MID 50S.
MTZ309-191000-
EASTERN PONDERA AND EASTERN TETON-
INCLUDING THE CITIES OF BRADY, CONRAD, AND LEDGER
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PATCHY SMOKE. PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF THUNDERSTORMS. SLIGHT CHANCE OF RAIN SHOWERS EARLY IN
THE AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS IN THE EVENING.
HIGHS IN THE LOWER 80S. LOWS 49 TO 54. SOUTHWEST WINDS UP TO
10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
MOSTLY SUNNY. PATCHY SMOKE THROUGH THE DAY. HIGHS IN
THE MID 80S. WEST WINDS 5 TO 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S. WEST
WINDS UP TO 10 MPH.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE LOWER
80S. LOWS IN THE LOWER 50S. NORTH WINDS UP TO 10 MPH.
FRIDAY
SUNNY. HIGHS IN THE MID 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. A 20 PERCENT CHANCE OF RAIN SHOWERS. LOWS IN THE UPPER
50S.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
HIGHS IN THE MID 80S. CHANCE OF PRECIPITATION 20 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
WITH SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN THE
MID 50S. CHANCE OF PRECIPITATION 30 PERCENT.
SUNDAY THROUGH MONDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE LOWER
80S. LOWS IN THE LOWER 50S.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE MID 80S.
MTZ310-191000-
WESTERN AND CENTRAL CHOUTEAU COUNTY-
INCLUDING THE CITIES OF FLOWEREE, CARTER, AND FORT BENTON
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PATCHY SMOKE AFTER MIDNIGHT. PATCHY SMOKE IN
THE EVENING. PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. HIGHS IN THE LOWER 80S. LOWS 51 TO 58.
SOUTHWEST WINDS UP TO 10 MPH WITH GUSTS TO AROUND 25 MPH. CHANCE
OF PRECIPITATION 40 PERCENT.
WEDNESDAY
MOSTLY SUNNY. PATCHY SMOKE IN THE AFTERNOON. HIGHS
IN THE MID 80S. WEST WINDS 5 TO 15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTHWEST
WINDS UP TO 10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE MID 80S. WEST WINDS UP TO 5 MPH
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. NORTH WINDS
5 TO 10 MPH SHIFTING TO THE EAST AFTER MIDNIGHT.
FRIDAY
SUNNY. HIGHS IN THE UPPER 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. LOWS IN THE LOWER 60S.
SATURDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE UPPER 80S.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF PRECIPITATION
40 PERCENT.
SUNDAY THROUGH TUESDAY
MOSTLY CLEAR. HIGHS IN THE MID 80S.
LOWS IN THE MID 50S.
MTZ311-191000-
BEARS PAW MOUNTAINS AND SOUTHERN BLAINE-
INCLUDING THE CITY OF ROCKY BOY
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. SLIGHT CHANCE OF RAIN SHOWERS EARLY IN THE
AFTERNOON. PATCHY SMOKE, THEN SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING. HIGHS 78 TO 84. LOWS 52 TO 59. SOUTHWEST WINDS UP TO
10 MPH.
WEDNESDAY
MOSTLY SUNNY. HIGHS 80 TO 86. WEST WINDS 5 TO
15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S.
NORTHWEST WINDS UP TO 10 MPH SHIFTING TO THE EAST AFTER MIDNIGHT.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS 81 TO 87. LOWS
IN THE UPPER 50S. EAST WINDS UP TO 10 MPH.
FRIDAY
SUNNY. HIGHS 81 TO 87.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. LOWS IN THE LOWER 60S.
SATURDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN
THE MORNING. HIGHS 83 TO 89.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
WITH SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS AROUND
60. CHANCE OF PRECIPITATION 30 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS 79 TO 85.
SUNDAY NIGHT THROUGH MONDAY NIGHT
MOSTLY CLEAR. LOWS IN THE
UPPER 50S. HIGHS 80 TO 86.
TUESDAY
MOSTLY SUNNY. HIGHS 83 TO 89.
MTZ312-191000-
CASCADE COUNTY BELOW 5000FT-
INCLUDING THE CITY OF GREAT FALLS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS IN THE LOWER 80S. LOWS 51 TO 57. SOUTHWEST
WINDS UP TO 15 MPH.
WEDNESDAY
SUNNY. PATCHY SMOKE IN THE AFTERNOON. HIGHS IN THE
MID 80S. SOUTHWEST WINDS 5 TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. WEST WINDS
UP TO 10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE MID 80S. SOUTHWEST WINDS UP TO
10 MPH SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. NORTHEAST
WINDS 5 TO 10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
FRIDAY
SUNNY. HIGHS IN THE MID 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. A 20 PERCENT CHANCE OF RAIN SHOWERS. LOWS AROUND 60.
SATURDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE UPPER 80S.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF PRECIPITATION
40 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS IN THE LOWER 80S.
SUNDAY NIGHT THROUGH TUESDAY
MOSTLY CLEAR. LOWS IN THE MID
50S. HIGHS IN THE MID 80S.
TEMPERATURE / PRECIPITATION
GREAT FALLS ARPT 53 86 55 85 / 20 0 0 0
MTZ313-191000-
JUDITH BASIN COUNTY AND JUDITH GAP-
INCLUDING THE CITIES OF RAYNESFORD, GEYSER, STANFORD, WINDHAM,
BENCHLAND, HOBSON, AND MOCCASIN
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS IN THE UPPER 70S. LOWS
50 TO 55. SOUTHWEST WINDS UP TO 15 MPH. CHANCE OF PRECIPITATION
40 PERCENT.
WEDNESDAY
SUNNY. PATCHY SMOKE IN THE AFTERNOON. HIGHS IN THE
LOWER 80S. WEST WINDS 10 TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. NORTHWEST
WINDS UP TO 10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE
SOUTHWEST AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE MID 80S. SOUTHWEST WINDS UP TO
10 MPH SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. NORTH WINDS
5 TO 10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
FRIDAY
SUNNY. HIGHS IN THE MID 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY CLOUDY
WITH A 20 PERCENT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS IN
THE UPPER 50S.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN
THE UPPER 80S. CHANCE OF PRECIPITATION 40 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF PRECIPITATION
40 PERCENT.
SUNDAY AND SUNDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
RAIN SHOWERS. HIGHS IN THE LOWER 80S. LOWS IN THE LOWER 50S.
MONDAY
SUNNY. HIGHS IN THE LOWER 80S.
MONDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS IN THE MID 50S.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE MID 80S.
MTZ314-191000-
FERGUS COUNTY BELOW 4500FT-
INCLUDING THE CITIES OF HILGER AND LEWISTOWN
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. PATCHY SMOKE IN THE AFTERNOON.
HIGHS IN THE LOWER 80S. LOWS 52 TO 60. SOUTHWEST WINDS UP TO
10 MPH. CHANCE OF PRECIPITATION 50 PERCENT.
WEDNESDAY
SUNNY. PATCHY SMOKE IN THE AFTERNOON. HIGHS IN THE
MID 80S. WEST WINDS 5 TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 54 TO 60. NORTHWEST WINDS
UP TO 10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS UP TO
10 MPH SHIFTING TO THE NORTH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. NORTH
WINDS 5 TO 10 MPH SHIFTING TO THE EAST AFTER MIDNIGHT.
FRIDAY
SUNNY. HIGHS IN THE MID 80S.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. LOWS IN THE LOWER 60S.
SATURDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE UPPER 80S.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS 57 TO 63. CHANCE OF PRECIPITATION
40 PERCENT.
SUNDAY AND SUNDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
RAIN SHOWERS. HIGHS IN THE MID 80S. LOWS 54 TO 60.
MONDAY
SUNNY. HIGHS IN THE MID 80S.
MONDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS 55 TO 61.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
TEMPERATURE / PRECIPITATION
LEWISTOWN 51 82 52 85 / 30 0 0 0
MTZ315-191000-
UPPER BLACKFOOT AND MACDONALD PASS-
INCLUDING THE CITIES OF MARYSVILLE, LINCOLN, FLESHER PASS,
AND MACDONALD PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 68 TO 76. LOWS 48 TO 56. SOUTHWEST WINDS UP
TO 15 MPH.
WEDNESDAY
SUNNY. HIGHS 70 TO 80. WEST WINDS UP TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 49 TO 55. WEST WINDS UP TO
10 MPH. GUSTS UP TO 25 MPH IN THE EVENING.
THURSDAY
SUNNY. HIGHS 75 TO 85. WEST WINDS UP TO 10 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS 50 TO 58. NORTH WINDS UP TO
10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS 75 TO 85.
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
LOWS 53 TO 61. CHANCE OF PRECIPITATION 20 PERCENT.
SATURDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 73 TO 81. CHANCE
OF PRECIPITATION 50 PERCENT.
SATURDAY NIGHT
PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS 48 TO 56.
CHANCE OF PRECIPITATION 30 PERCENT.
SUNDAY THROUGH MONDAY
MOSTLY CLEAR. HIGHS 68 TO 79. LOWS 47 TO
55.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 49 TO 55.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 72 TO 80.
MTZ316-191000-
GATES OF THE MOUNTAINS-
INCLUDING THE CITIES OF CANYON CREEK, WOLF CREEK, AND CRAIG
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 74 TO 82. LOWS IN THE MID 50S. SOUTHWEST
WINDS UP TO 15 MPH.
WEDNESDAY
SUNNY. HIGHS 78 TO 86. SOUTHWEST WINDS 5 TO 10 MPH
WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. SOUTHWEST
WINDS UP TO 10 MPH.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS 80 TO 88. LOWS
IN THE MID 50S. NORTHWEST WINDS UP TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS 80 TO 88.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLOUDY. A 20 PERCENT CHANCE
OF THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS 79 TO 87.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF PRECIPITATION
30 PERCENT.
SUNDAY THROUGH MONDAY
MOSTLY CLEAR. HIGHS 75 TO 85. LOWS IN
THE MID 50S.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S.
TUESDAY
SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS 78 TO 86.
MTZ317-191000-
LITTLE BELT AND HIGHWOOD MOUNTAINS-
INCLUDING THE CITIES OF MONARCH, NEIHART, AND KINGS HILL PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS 67 TO 75. LOWS 48 TO 56.
SOUTHWEST WINDS UP TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE
OF PRECIPITATION 50 PERCENT.
WEDNESDAY
SUNNY. PATCHY SMOKE IN THE AFTERNOON. HIGHS 71 TO
79. WEST WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 51 TO 57. WEST WINDS UP TO
10 MPH WITH GUSTS TO AROUND 30 MPH SHIFTING TO THE SOUTHWEST
AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 74 TO 82. SOUTHWEST WINDS UP TO 10 MPH
SHIFTING TO THE WEST WITH GUSTS TO AROUND 30 MPH IN THE
AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS 51 TO 57. NORTH WINDS UP TO
10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE SOUTHEAST
AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS 77 TO 83.
FRIDAY NIGHT
PARTLY CLOUDY WITH SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING, THEN MOSTLY CLOUDY WITH SLIGHT CHANCE OF RAIN
SHOWERS AFTER MIDNIGHT. LOWS 55 TO 63. CHANCE OF PRECIPITATION
20 PERCENT.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS
75 TO 83. CHANCE OF PRECIPITATION 40 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS 52 TO 58. CHANCE OF PRECIPITATION
40 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS 70 TO 78.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS 50 TO 56.
MONDAY
SUNNY. HIGHS 71 TO 79.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 51 TO 57.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 73 TO 81.
MTZ318-191000-
SNOWY AND JUDITH MOUNTAINS-
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 50 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 70 TO 76. LOWS 50 TO 55. SOUTHWEST WINDS UP
TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
SUNNY. PATCHY SMOKE IN THE AFTERNOON. HIGHS 73 TO
79. WEST WINDS 5 TO 15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. PATCHY SMOKE IN THE EVENING.
LOWS 52 TO 58. NORTHWEST WINDS UP TO 10 MPH WITH GUSTS TO AROUND
25 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 77 TO 83. SOUTHWEST WINDS UP TO 10 MPH
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTH WINDS
5 TO 10 MPH SHIFTING TO THE SOUTHEAST AFTER MIDNIGHT.
FRIDAY
SUNNY. HIGHS 76 TO 82.
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY CLOUDY
WITH A 20 PERCENT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS
56 TO 62.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS 77 TO 85. CHANCE OF
PRECIPITATION 30 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS IN THE UPPER
50S. CHANCE OF PRECIPITATION 40 PERCENT.
SUNDAY AND SUNDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
RAIN SHOWERS. HIGHS 74 TO 80. LOWS IN THE MID 50S.
MONDAY
SUNNY. HIGHS 74 TO 80.
MONDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS IN THE MID 50S.
TUESDAY
MOSTLY SUNNY. HIGHS 75 TO 83.
MTZ319-191000-
HELENA VALLEY-
INCLUDING THE CITY OF HELENA
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS IN THE LOWER 80S. LOWS
50 TO 55. SOUTHWEST WINDS UP TO 15 MPH. CHANCE OF PRECIPITATION
30 PERCENT.
WEDNESDAY
SUNNY. HIGHS IN THE MID 80S. SOUTH WINDS UP TO 5 MPH
SHIFTING TO THE WEST IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 50S. NORTHWEST
WINDS UP TO 10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
THURSDAY AND THURSDAY NIGHT
MOSTLY CLEAR. HIGHS IN THE UPPER
80S. LOWS IN THE MID 50S. NORTHWEST WINDS UP TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
FRIDAY NIGHT
PARTLY CLOUDY WITH SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING, THEN MOSTLY CLOUDY WITH SLIGHT CHANCE OF RAIN
SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF
PRECIPITATION 20 PERCENT.
SATURDAY
PARTLY SUNNY. A 40 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE UPPER 80S.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF PRECIPITATION
30 PERCENT.
SUNDAY
SUNNY. HIGHS IN THE LOWER 80S.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S.
MONDAY
SUNNY. HIGHS IN THE MID 80S.
MONDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS IN THE LOWER 50S.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE MID 80S.
TEMPERATURE / PRECIPITATION
HELENA 53 86 53 89 / 30 0 0 0
MTZ320-191000-
BIG BELT, BRIDGER AND CASTLE MOUNTAINS-
INCLUDING THE CITIES OF TRIDENT, MAUDLOW, BATTLE RIDGE PASS,
BOZEMAN PASS, AND DEEP CREEK PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS 67 TO 75. LOWS 50 TO 55.
SOUTHWEST WINDS UP TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE
OF PRECIPITATION 50 PERCENT.
WEDNESDAY
SUNNY. HIGHS 70 TO 80. WEST WINDS UP TO 15 MPH WITH
GUSTS TO AROUND 35 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. NORTHWEST
WINDS UP TO 10 MPH WITH GUSTS TO AROUND 30 MPH SHIFTING TO THE
SOUTH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 75 TO 85. SOUTH WINDS UP TO 5 MPH
SHIFTING TO THE WEST WITH GUSTS TO AROUND 30 MPH IN THE
AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTH WINDS
UP TO 10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE EAST
AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS 75 TO 85.
FRIDAY NIGHT
PARTLY CLOUDY WITH SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING, THEN MOSTLY CLOUDY WITH SLIGHT CHANCE OF RAIN
SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF
PRECIPITATION 20 PERCENT.
SATURDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 74 TO 82. CHANCE
OF PRECIPITATION 50 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF PRECIPITATION
30 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS 70 TO 80.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S.
MONDAY
SUNNY. HIGHS 71 TO 79.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS 72 TO 80.
MTZ321-191000-
MEAGHER COUNTY VALLEYS-
INCLUDING THE CITIES OF MARTINSDALE, CHECKERBOARD, RINGLING,
AND WHITE SULPHUR SPRINGS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS IN THE MID 70S. LOWS 46 TO
52. SOUTH WINDS UP TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE
OF PRECIPITATION 30 PERCENT.
WEDNESDAY
SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS UP TO
10 MPH SHIFTING TO THE WEST IN THE AFTERNOON. GUSTS UP TO 30 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 50. NORTHWEST WINDS
5 TO 10 MPH WITH GUSTS TO AROUND 30 MPH SHIFTING TO THE SOUTH
AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE MID 80S. SOUTH WINDS UP TO 5 MPH
SHIFTING TO THE WEST WITH GUSTS TO AROUND 30 MPH IN THE
AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S. NORTH
WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE
EAST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE MID 80S.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLOUDY. A 20 PERCENT CHANCE
OF THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
AFTER MIDNIGHT. LOWS IN THE LOWER 50S. CHANCE OF PRECIPITATION
30 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS IN THE UPPER 70S.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 50.
MONDAY
SUNNY. HIGHS AROUND 80.
MONDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 50S.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
MTZ322-191000-
ELKHORN AND BOULDER MOUNTAINS-
INCLUDING THE CITIES OF MONTANA CITY, CLANCY, BOULDER, CORBIN,
WICKES, ELK PARK PASS, AND HOMESTAKE PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 50 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 68 TO 76. LOWS 47 TO 56. WEST WINDS UP TO
10 MPH.
WEDNESDAY
SUNNY. HIGHS 71 TO 81. WEST WINDS UP TO 10 MPH.
GUSTS UP TO 25 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS 49 TO 55. WEST WINDS UP TO
10 MPH.
THURSDAY
SUNNY. HIGHS 75 TO 85. WEST WINDS UP TO 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 51 TO 59. NORTHWEST WINDS
UP TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS 76 TO 84.
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. LOWS 53 TO 61. CHANCE OF
PRECIPITATION 40 PERCENT.
SATURDAY
PARTLY SUNNY. A 50 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 73 TO 81.
SATURDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
WITH SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS 48 TO 56.
CHANCE OF PRECIPITATION 30 PERCENT.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS 69 TO 79.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS 47 TO 55.
MONDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS 71 TO 79.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. LOWS 49 TO 55. HIGHS 72 TO 80.
MTZ323-191000-
CANYON FERRY AREA-
INCLUDING THE CITIES OF TOSTON, TOWNSEND, AND WINSTON
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS IN THE UPPER 70S. LOWS
50 TO 57. SOUTH WINDS UP TO 10 MPH. CHANCE OF PRECIPITATION
40 PERCENT.
WEDNESDAY
SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS UP TO
5 MPH SHIFTING TO THE NORTHWEST WITH GUSTS TO AROUND 25 MPH IN
THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 51 TO 57. NORTH WINDS UP TO
10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE MID 80S. SOUTH WINDS UP TO 5 MPH
SHIFTING TO THE SOUTHWEST IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. NORTH
WINDS UP TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLOUDY. A 20 PERCENT CHANCE
OF THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE MID 80S.
SATURDAY NIGHT
MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT.
LOWS IN THE MID 50S.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS IN THE LOWER 80S.
SUNDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS IN THE MID 50S.
MONDAY
SUNNY. HIGHS IN THE LOWER 80S.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. LOWS 52 TO 58. HIGHS IN THE LOWER 80S.
MTZ324-191000-
MISSOURI HEADWATERS-
INCLUDING THE CITIES OF HARRISON, THREE FORKS, WILLOW CREEK,
PONY, AND WHITEHALL
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 70S. LOWS 49 TO 55. SOUTHWEST
WINDS UP TO 10 MPH.
WEDNESDAY
SUNNY. HIGHS IN THE LOWER 80S. WEST WINDS UP TO
10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 50S. WEST
WINDS UP TO 10 MPH.
THURSDAY
SUNNY. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS UP TO
5 MPH. GUSTS UP TO 20 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTH WINDS
UP TO 10 MPH SHIFTING TO THE NORTHWEST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF
PRECIPITATION 40 PERCENT.
SATURDAY
PARTLY SUNNY. A 40 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE MID 80S.
SATURDAY NIGHT
MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT.
LOWS IN THE MID 50S.
SUNDAY
SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS IN THE LOWER 80S.
SUNDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS IN THE LOWER 50S.
MONDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS IN THE LOWER 80S.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 80S.
MTZ325-191000-
MADISON RIVER VALLEY-
INCLUDING THE CITIES OF CAMERON, ENNIS, JEFFERS, MCALLISTER,
AND NORRIS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 50 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 70S. LOWS 46 TO 54. SOUTH WINDS
UP TO 15 MPH.
WEDNESDAY
SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS UP TO
10 MPH SHIFTING TO THE WEST IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 49 TO 55. WEST WINDS UP TO
10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE UPPER 80S. SOUTH WINDS UP TO
5 MPH SHIFTING TO THE WEST IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 52 TO 58. NORTH WINDS UP TO
10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF
PRECIPITATION 40 PERCENT.
SATURDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN
THE MID 80S. CHANCE OF PRECIPITATION 50 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING. LOWS 50 TO 56.
SUNDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE LOWER 80S.
SUNDAY NIGHT
MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT. LOWS
49 TO 55.
MONDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS AROUND 80.
MONDAY NIGHT
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLOUDY
AFTER MIDNIGHT. LOWS 49 TO 55. CHANCE OF PRECIPITATION
40 PERCENT.
TUESDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 80S. CHANCE
OF PRECIPITATION 40 PERCENT.
MTZ326-191000-
GALLATIN VALLEY-
INCLUDING THE CITIES OF BOZEMAN AND GALLATIN GATEWAY
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. A 40 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 70S. LOWS IN THE LOWER 50S.
SOUTH WINDS UP TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS UP TO
5 MPH SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 50S. NORTHWEST
WINDS UP TO 10 MPH SHIFTING TO THE SOUTHEAST AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS IN THE UPPER 80S. SOUTH WINDS UP TO
5 MPH SHIFTING TO THE NORTHWEST WITH GUSTS TO AROUND 20 MPH IN
THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTHEAST
WINDS UP TO 5 MPH SHIFTING TO THE SOUTHEAST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
LOWS IN THE UPPER 50S. CHANCE OF PRECIPITATION 20 PERCENT.
SATURDAY
PARTLY SUNNY. A 50 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE MID 80S.
SATURDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS IN THE MID
50S. CHANCE OF PRECIPITATION 30 PERCENT.
SUNDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE LOWER 80S.
SUNDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS IN THE LOWER 50S.
MONDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS IN THE LOWER 80S.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 80S.
TEMPERATURE / PRECIPITATION
BOZEMAN AIRPORT 50 83 50 90 / 30 0 0 0
BOZEMAN MSU 52 81 54 88 / 40 0 0 0
MTZ330-191000-
GALLATIN AND MADISON COUNTY MOUNTAINS AND CENTENNIAL MOUNTAINS-
INCLUDING THE CITIES OF BIG SKY, WEST YELLOWSTONE, TARGHEE PASS,
AND RAYNOLDS PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
MOSTLY CLOUDY. A 50 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 63 TO 73. LOWS 42 TO 52. SOUTHWEST WINDS UP
TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
WEDNESDAY
SUNNY. HIGHS 67 TO 77. WEST WINDS UP TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 46 TO 54. WEST WINDS UP TO
10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE SOUTH AFTER
MIDNIGHT.
THURSDAY
SUNNY. HIGHS 72 TO 82. SOUTH WINDS UP TO 5 MPH
SHIFTING TO THE WEST WITH GUSTS TO AROUND 25 MPH IN THE
AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 50 TO 56. SOUTHWEST WINDS
UP TO 10 MPH SHIFTING TO THE SOUTHEAST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS 74 TO 84.
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. LOWS 52 TO 58. CHANCE OF
PRECIPITATION 40 PERCENT.
SATURDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS
69 TO 79. CHANCE OF PRECIPITATION 50 PERCENT.
SATURDAY NIGHT
MOSTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING. LOWS 48 TO 54.
SUNDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 66 TO 76. CHANCE OF
PRECIPITATION 40 PERCENT.
SUNDAY NIGHT
MOSTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS 46 TO 52.
MONDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 66 TO 76. CHANCE OF
PRECIPITATION 30 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS 46 TO 52. CHANCE OF
PRECIPITATION 40 PERCENT.
TUESDAY
MOSTLY SUNNY. A 40 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 66 TO 76.
TEMPERATURE / PRECIPITATION
WEST YELLOWSTONE 38 79 39 84 / 30 0 0 0
MTZ327-191000-
NORTHWEST BEAVERHEAD COUNTY-
INCLUDING THE CITIES OF DEWEY, WISDOM, WISE RIVER, BIG HOLE PASS,
AND CHIEF JOSEPH PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 65 TO 75. LOWS 40 TO 52. WEST WINDS UP TO
15 MPH.
WEDNESDAY
SUNNY. HIGHS 69 TO 79. WEST WINDS UP TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS 43 TO 53. NORTHWEST WINDS
5 TO 10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE SOUTHWEST
AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 74 TO 84. SOUTHWEST WINDS UP TO 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 48 TO 56. NORTHWEST WINDS
UP TO 10 MPH SHIFTING TO THE EAST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS 75 TO 85.
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS 48 TO 56. CHANCE OF
PRECIPITATION 50 PERCENT.
SATURDAY
PARTLY SUNNY. A 40 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 69 TO 79.
SATURDAY NIGHT
COLDER. MOSTLY CLOUDY WITH A 20 PERCENT CHANCE
OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY AFTER
MIDNIGHT. LOWS 42 TO 52.
SUNDAY
SUNNY. HIGHS 67 TO 77.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS 42 TO 52.
MONDAY
SUNNY. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS 67 TO 77.
MONDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING. LOWS 42 TO 52.
TUESDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 67 TO 77. CHANCE OF
PRECIPITATION 40 PERCENT.
MTZ328-191000-
BEAVERHEAD AND WESTERN MADISON BELOW 6000FT-
INCLUDING THE CITIES OF BANNACK, DILLON, GLEN, AND WATERLOO
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
THUNDERSTORMS. HIGHS 74 TO 80. LOWS 47 TO 53. SOUTHWEST WINDS UP
TO 15 MPH.
WEDNESDAY
SUNNY. HIGHS 78 TO 84. SOUTHWEST WINDS UP TO 10 MPH
WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 50S. NORTHWEST
WINDS UP TO 10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 82 TO 88. SOUTHWEST WINDS UP TO 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTHWEST
WINDS UP TO 10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS 82 TO 88.
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS IN THE MID 50S.
CHANCE OF PRECIPITATION 50 PERCENT.
SATURDAY
PARTLY SUNNY. A 40 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 79 TO 85.
SATURDAY NIGHT AND SUNDAY
PARTLY CLOUDY. A 20 PERCENT CHANCE
OF THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS 77 TO 83.
SUNDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING. LOWS IN THE LOWER 50S.
MONDAY THROUGH TUESDAY
PARTLY CLOUDY WITH A 20 PERCENT CHANCE
OF THUNDERSTORMS. HIGHS 76 TO 82. LOWS IN THE LOWER 50S.
TEMPERATURE / PRECIPITATION
DILLON 48 83 49 86 / 30 0 0 0
MTZ329-191000-
RUBY MOUNTAINS AND SOUTHERN BEAVERHEAD MOUNTAINS-
INCLUDING THE CITY OF MONIDA PASS
1232 AM MDT TUE AUG 18 2026
REST OF TONIGHT
PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS 68 TO 76. LOWS 47 TO 53.
SOUTHWEST WINDS UP TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE
OF PRECIPITATION 40 PERCENT.
WEDNESDAY
SUNNY. HIGHS 71 TO 79. WEST WINDS UP TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 50S. NORTHWEST
WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE
SOUTH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 75 TO 83. SOUTHWEST WINDS UP TO 10 MPH.
GUSTS UP TO 30 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 50S. WEST WINDS 5 TO 10 MPH
SHIFTING TO THE SOUTH AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS 76 TO 84.
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. LOWS IN THE MID 50S. CHANCE OF
PRECIPITATION 50 PERCENT.
SATURDAY
PARTLY SUNNY. A 50 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 71 TO 79.
SATURDAY NIGHT
MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT.
LOWS IN THE LOWER 50S.
SUNDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 69 TO 77. CHANCE OF
PRECIPITATION 40 PERCENT.
SUNDAY NIGHT
MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF RAIN
SHOWERS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT. LOWS
AROUND 50.
MONDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 68 TO 76. CHANCE OF
PRECIPITATION 40 PERCENT.
MONDAY NIGHT AND TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS AROUND 50. HIGHS 68 TO
76. CHANCE OF PRECIPITATION 40 PERCENT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page