600
FPUS55 KTFX 181247
ZFPTFX
ZONE FORECAST PRODUCT FOR CENTRAL AND SOUTHWEST MONTANA
NATIONAL WEATHER SERVICE GREAT FALLS MT
647 AM MDT MON MAY 18 2026
SPOT TEMPERATURES AND PROBABILITIES OF MEASURABLE PRECIPITATION
ARE FOR TODAY, TONIGHT, AND TUESDAY.
MTZ301-182200-
EAST GLACIER PARK REGION-
INCLUDING THE CITIES OF EAST GLACIER PARK, KIOWA, BABB,
SAINT MARY, MARIAS PASS, AND LOGAN PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. CHANCE OF SNOW SHOWERS AND RAIN SHOWERS EARLY IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS, SNOW SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS LATE IN THE AFTERNOON. HIGHS 38 TO 48. WEST
WINDS 5 TO 10 MPH. CHANCE OF PRECIPITATION 50 PERCENT.
TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN AND SNOW IN
THE EVENING. LOWS 27 TO 33. SOUTHWEST WINDS 5 TO 15 MPH. GUSTS UP
TO 25 MPH INCREASING TO 35 MPH AFTER MIDNIGHT.
TUESDAY
BREEZY. NOT AS COOL. PARTLY SUNNY. A 20 PERCENT CHANCE
OF RAIN AND SNOW IN THE AFTERNOON. HIGHS 43 TO 55. WEST WINDS
10 TO 25 MPH WITH GUSTS TO AROUND 40 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN AND
SNOW AFTER MIDNIGHT. LOWS 32 TO 38. SOUTHWEST WINDS 10 TO 20 MPH.
GUSTS UP TO 40 MPH DECREASING TO 30 MPH AFTER MIDNIGHT.
WEDNESDAY
RAIN AND SNOW LIKELY IN THE MORNING, THEN RAIN AND
SNOW IN THE AFTERNOON. LIGHT SNOW ACCUMULATIONS. SNOW LEVEL
6700 FEET. HIGHS 42 TO 52. NORTHWEST WINDS 5 TO 10 MPH. CHANCE OF
PRECIPITATION 80 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW IN
THE EVENING, THEN PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND
SNOW AFTER MIDNIGHT. LOWS 29 TO 35. CHANCE OF PRECIPITATION
50 PERCENT.
THURSDAY
NOT AS COOL. MOSTLY SUNNY. HIGHS 46 TO 58.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY
CLOUDY WITH A 20 PERCENT CHANCE OF RAIN AFTER MIDNIGHT. LOWS
33 TO 39.
FRIDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN CHANCE OF RAIN IN THE AFTERNOON. HIGHS 50 TO 60. CHANCE OF
RAIN 40 PERCENT.
FRIDAY NIGHT THROUGH SUNDAY
BREEZY. PARTLY CLOUDY. LOWS 36 TO
44. HIGHS 54 TO 64.
MTZ307-182200-
SOUTHERN ROCKY MOUNTAIN FRONT-
INCLUDING THE CITY OF ROGERS PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. SUNNY IN THE MORNING, THEN PARTLY
SUNNY WITH CHANCE OF SNOW SHOWERS EARLY IN THE AFTERNOON. PARTLY
SUNNY WITH CHANCE OF SNOW SHOWERS, RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS LATE IN THE AFTERNOON. HIGHS 37 TO 45. NORTH
WINDS UP TO 10 MPH. CHANCE OF PRECIPITATION 50 PERCENT.
TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN AND SNOW IN
THE EVENING. LOWS 23 TO 29. WEST WINDS UP TO 10 MPH. GUSTS UP TO
30 MPH AFTER MIDNIGHT.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
AND SNOW IN THE AFTERNOON. HIGHS 43 TO 53. WEST WINDS 5 TO 15 MPH
WITH GUSTS TO AROUND 35 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 29 TO 35. WEST WINDS 5 TO
15 MPH WITH GUSTS TO AROUND 35 MPH.
WEDNESDAY
MOSTLY SUNNY WITH SLIGHT CHANCE OF RAIN AND SNOW IN
THE MORNING, THEN MOSTLY CLOUDY WITH RAIN SHOWERS, SNOW LIKELY
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. SNOW LEVEL
7000 FEET. HIGHS 43 TO 55. WEST WINDS 5 TO 10 MPH. CHANCE OF
PRECIPITATION 70 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN AND SNOW LIKELY IN THE
EVENING, THEN CHANCE OF SNOW AND SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT. LIGHT SNOW ACCUMULATIONS. LOWS 28 TO 34. CHANCE OF
PRECIPITATION 70 PERCENT.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF SNOW IN THE
MORNING. HIGHS 45 TO 57.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING
MOSTLY CLOUDY. LOWS 31 TO 37.
FRIDAY
PARTLY SUNNY WITH A 20 PERCENT CHANCE OF RAIN. HIGHS
51 TO 61.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
PARTLY CLOUDY. LOWS 33 TO
43. HIGHS 54 TO 66.
SUNDAY
SUNNY. HIGHS 55 TO 67.
MTZ302-182200-
NORTHERN HIGH PLAINS-
INCLUDING THE CITIES OF BROWNING, HEART BUTTE, AND DUPUYER
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. A 20 PERCENT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. HIGHS IN THE LOWER 50S. WEST WINDS 5 TO 10 MPH
SHIFTING TO THE SOUTH IN THE AFTERNOON.
TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN IN THE
EVENING. LOWS IN THE LOWER 30S. SOUTHWEST WINDS 5 TO 15 MPH.
GUSTS UP TO 30 MPH AFTER MIDNIGHT.
TUESDAY
BREEZY. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN
THE AFTERNOON. HIGHS AROUND 60. WEST WINDS 15 TO 25 MPH WITH
GUSTS TO AROUND 40 MPH.
TUESDAY NIGHT
BREEZY. PARTLY CLOUDY. LOWS IN THE UPPER 30S.
WEST WINDS 10 TO 25 MPH DECREASING TO 10 TO 15 MPH AFTER
MIDNIGHT.
WEDNESDAY
RAIN LIKELY IN THE MORNING, THEN RAIN IN THE
AFTERNOON. HIGHS IN THE MID 50S. NORTHWEST WINDS 5 TO 15 MPH.
CHANCE OF RAIN 80 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN IN THE
EVENING, THEN PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT. LOWS IN THE MID 30S. CHANCE OF RAIN 50 PERCENT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING
MOSTLY CLOUDY. LOWS AROUND 40.
FRIDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN CHANCE OF RAIN IN THE AFTERNOON. HIGHS IN THE MID 60S.
CHANCE OF RAIN 40 PERCENT.
FRIDAY NIGHT THROUGH SUNDAY
BREEZY. PARTLY CLOUDY. LOWS IN THE
LOWER 40S. HIGHS AROUND 70.
MTZ308-182200-
SOUTHERN HIGH PLAINS-
INCLUDING THE CITIES OF BYNUM, CHOTEAU, AND PENDROY
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. SLIGHT CHANCE OF RAIN SHOWERS AND SNOW SHOWERS EARLY
IN THE AFTERNOON. SLIGHT CHANCE OF THUNDERSTORMS LATE IN THE
AFTERNOON. HIGHS IN THE LOWER 50S. NORTH WINDS 5 TO 10 MPH
SHIFTING TO THE EAST IN THE AFTERNOON. CHANCE OF PRECIPITATION
20 PERCENT.
TONIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN IN THE
EVENING. LOWS IN THE LOWER 30S. SOUTHWEST WINDS 5 TO 10 MPH.
GUSTS UP TO 30 MPH AFTER MIDNIGHT.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. WEST WINDS 5 TO 15 MPH WITH
GUSTS TO AROUND 35 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. WEST WINDS
5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
WEDNESDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE UPPER 50S. WEST WINDS 5 TO 10 MPH
SHIFTING TO THE NORTH IN THE AFTERNOON. CHANCE OF PRECIPITATION
70 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN LIKELY IN THE EVENING,
THEN CHANCE OF RAIN AFTER MIDNIGHT. LOWS IN THE MID 30S. CHANCE
OF RAIN 70 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE LOWER
60S. LOWS IN THE LOWER 40S.
FRIDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE MID
40S. HIGHS IN THE MID 70S.
MTZ303-182200-
EASTERN GLACIER, WESTERN TOOLE, AND CENTRAL PONDERA-
INCLUDING THE CITIES OF CUT BANK, ETHRIDGE, AND SANTA RITA
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. A 20 PERCENT CHANCE OF RAIN SHOWERS LATE IN THE
AFTERNOON. HIGHS IN THE MID 50S. NORTHWEST WINDS UP TO 5 MPH
SHIFTING TO THE SOUTHEAST IN THE AFTERNOON.
TONIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 30S. SOUTHWEST WINDS
5 TO 10 MPH.
TUESDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. WEST WINDS 5 TO 20 MPH WITH
GUSTS TO AROUND 35 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. WEST WINDS
10 TO 20 MPH.
WEDNESDAY
MOSTLY CLOUDY. CHANCE OF RAIN IN THE MORNING, THEN
RAIN LIKELY IN THE AFTERNOON. HIGHS IN THE UPPER 50S. NORTHWEST
WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE OF RAIN
70 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF RAIN
IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT. LOWS IN THE
MID 30S.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING
MOSTLY CLOUDY. LOWS AROUND 40.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
BREEZY. PARTLY CLOUDY. LOWS IN THE
LOWER 40S. HIGHS IN THE LOWER 70S.
TEMPERATURE / PRECIPITATION
CUT BANK 54 31 63 / 20 10 20
MTZ304-182200-
EASTERN TOOLE AND LIBERTY-
INCLUDING THE CITIES OF DEVON, SHELBY, CHESTER, GALATA, JOPLIN,
LOTHAIR, AND WHITLASH
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. HIGHS IN THE LOWER 50S. NORTH WINDS UP TO 10 MPH
SHIFTING TO THE EAST IN THE AFTERNOON.
TONIGHT
PARTLY CLOUDY. LOWS 26 TO 32. SOUTH WINDS 5 TO 10 MPH
WITH GUSTS TO AROUND 30 MPH.
TUESDAY
MOSTLY SUNNY IN THE MORNING, THEN MOSTLY CLOUDY WITH A
20 PERCENT CHANCE OF RAIN IN THE AFTERNOON. HIGHS IN THE LOWER
60S. SOUTHWEST WINDS 5 TO 15 MPH.
TUESDAY NIGHT
NOT AS COOL. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. LOWS AROUND 40. WEST WINDS 5 TO 15 MPH.
WEDNESDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN CHANCE OF RAIN IN THE AFTERNOON. HIGHS 56 TO 62. NORTHWEST
WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE OF RAIN
50 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN IN THE
EVENING, THEN PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT. LOWS IN THE MID 30S. CHANCE OF RAIN 50 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE MID
60S. LOWS AROUND 40.
FRIDAY
PARTLY SUNNY. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE MID
40S. HIGHS IN THE MID 70S.
MTZ305-182200-
HILL COUNTY-
INCLUDING THE CITY OF HAVRE
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. PATCHY FOG EARLY IN THE MORNING.
HIGHS IN THE MID 50S. NORTH WINDS 5 TO 10 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 20S. SOUTHEAST WINDS
5 TO 10 MPH.
TUESDAY
WARMER. MOSTLY SUNNY. A 50 PERCENT CHANCE OF RAIN IN
THE AFTERNOON. HIGHS IN THE MID 60S. SOUTHWEST WINDS 5 TO 15 MPH.
TUESDAY NIGHT
NOT AS COOL. MOSTLY CLOUDY. LOWS IN THE LOWER
40S. SOUTHWEST WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN CHANCE OF RAIN IN THE AFTERNOON. HIGHS IN THE LOWER 60S.
NORTHWEST WINDS 5 TO 15 MPH. CHANCE OF RAIN 50 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN IN THE
EVENING, THEN PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT. LOWS IN THE UPPER 30S. CHANCE OF RAIN 40 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE MID
60S. LOWS IN THE UPPER 30S.
FRIDAY
PARTLY SUNNY. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE MID
40S. HIGHS IN THE UPPER 70S.
TEMPERATURE / PRECIPITATION
HAVRE 54 26 66 / 10 0 50
MTZ306-182200-
NORTHERN BLAINE COUNTY-
INCLUDING THE CITIES OF CHINOOK, ZURICH, HARLEM, HOGELAND,
AND FORT BELKNAP
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY CLOUDY UNTIL LATE AFTERNOON THEN BECOMING
MOSTLY SUNNY. HIGHS 46 TO 52. NORTH WINDS 10 TO 15 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE MID 20S. EAST WINDS 5 TO
10 MPH.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. HIGHS IN THE LOWER 60S.
SOUTH WINDS 5 TO 15 MPH.
TUESDAY NIGHT
NOT AS COOL. MOSTLY CLOUDY. LOWS AROUND 40.
SOUTHWEST WINDS 5 TO 15 MPH. GUSTS UP TO 30 MPH IN THE EVENING.
WEDNESDAY
PARTLY SUNNY. A 50 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. WEST WINDS 5 TO 15 MPH
SHIFTING TO THE NORTHWEST 15 TO 20 MPH WITH GUSTS TO AROUND
35 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN IN THE
EVENING, THEN CHANCE OF RAIN AFTER MIDNIGHT. LOWS IN THE UPPER
30S. CHANCE OF RAIN 30 PERCENT.
THURSDAY THROUGH FRIDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE MID
60S. LOWS IN THE LOWER 40S.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S.
SATURDAY NIGHT
PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING, THEN SLIGHT CHANCE OF RAIN AFTER MIDNIGHT. LOWS
IN THE MID 40S. CHANCE OF PRECIPITATION 20 PERCENT.
SUNDAY
BREEZY. MOSTLY SUNNY. HIGHS IN THE UPPER 70S.
MTZ309-182200-
EASTERN PONDERA AND EASTERN TETON-
INCLUDING THE CITIES OF BRADY, CONRAD, AND LEDGER
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. HIGHS IN THE MID 50S. NORTH WINDS UP TO 5 MPH
SHIFTING TO THE EAST AROUND 5 MPH IN THE AFTERNOON.
TONIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 20S. SOUTH WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE MID 60S. WEST WINDS 5 TO 15 MPH.
TUESDAY NIGHT
NOT AS COOL. PARTLY CLOUDY. LOWS IN THE UPPER
30S. WEST WINDS 5 TO 15 MPH.
WEDNESDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN RAIN LIKELY IN THE AFTERNOON. HIGHS AROUND 60. NORTHWEST
WINDS 5 TO 10 MPH. CHANCE OF RAIN 70 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN IN THE EVENING,
THEN SLIGHT CHANCE OF RAIN AFTER MIDNIGHT. LOWS IN THE MID 30S.
CHANCE OF RAIN 50 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE MID
60S. LOWS IN THE UPPER 30S.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER
40S. HIGHS IN THE MID 70S.
MTZ310-182200-
WESTERN AND CENTRAL CHOUTEAU COUNTY-
INCLUDING THE CITIES OF FLOWEREE, CARTER, AND FORT BENTON
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. HIGHS IN THE LOWER 50S. NORTH WINDS 5 TO 10 MPH.
GUSTS UP TO 30 MPH IN THE MORNING.
TONIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 20S. SOUTHEAST WINDS
5 TO 10 MPH.
TUESDAY
WARMER. SUNNY IN THE MORNING, THEN PARTLY SUNNY WITH A
20 PERCENT CHANCE OF RAIN IN THE AFTERNOON. HIGHS IN THE MID 60S.
SOUTHWEST WINDS 5 TO 15 MPH.
TUESDAY NIGHT
NOT AS COOL. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. LOWS IN THE LOWER 40S. SOUTHWEST WINDS
5 TO 15 MPH.
WEDNESDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE LOWER 60S. NORTHWEST WINDS 5 TO
15 MPH. CHANCE OF PRECIPITATION 50 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
RAIN. LOWS IN THE UPPER 30S.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
MORNING. HIGHS IN THE MID 60S.
THURSDAY NIGHT THROUGH FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE
LOWER 40S. HIGHS IN THE UPPER 60S.
SATURDAY THROUGH SUNDAY
PARTLY CLOUDY. HIGHS IN THE UPPER 70S.
LOWS IN THE UPPER 40S.
MTZ311-182200-
BEARS PAW MOUNTAINS AND SOUTHERN BLAINE-
INCLUDING THE CITY OF ROCKY BOY
647 AM MDT MON MAY 18 2026
REST OF TODAY
PARTLY SUNNY. HIGHS 46 TO 52. NORTH WINDS 5 TO
15 MPH. GUSTS UP TO 30 MPH IN THE MORNING.
TONIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 20S. EAST WINDS 5 TO
10 MPH SHIFTING TO THE SOUTHEAST AFTER MIDNIGHT.
TUESDAY
WARMER. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN
THE AFTERNOON. HIGHS 59 TO 65. SOUTHWEST WINDS 5 TO 15 MPH.
TUESDAY NIGHT
NOT AS COOL. MOSTLY CLOUDY. LOWS IN THE LOWER
40S. SOUTHWEST WINDS UP TO 15 MPH.
WEDNESDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 58 TO 64. WEST
WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE OF
PRECIPITATION 50 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN IN THE EVENING,
THEN SLIGHT CHANCE OF RAIN AFTER MIDNIGHT. LOWS IN THE UPPER 30S.
CHANCE OF RAIN 50 PERCENT.
THURSDAY
MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF RAIN. HIGHS
59 TO 65.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
FRIDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS 64 TO 70.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE UPPER
40S. HIGHS 70 TO 79.
MTZ312-182200-
CASCADE COUNTY BELOW 5000FT-
INCLUDING THE CITY OF GREAT FALLS
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. HIGHS 48 TO 54. NORTHWEST WINDS UP TO 10 MPH
SHIFTING TO THE NORTHEAST IN THE AFTERNOON.
TONIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 20S. SOUTH WINDS 5 TO
10 MPH.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
IN THE AFTERNOON. HIGHS IN THE LOWER 60S. SOUTHWEST WINDS 5 TO
15 MPH.
TUESDAY NIGHT
NOT AS COOL. PARTLY CLOUDY. LOWS AROUND 40.
SOUTHWEST WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY SUNNY. SLIGHT CHANCE OF RAIN IN THE MORNING,
THEN RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS AROUND 60. WEST WINDS 5 TO 10 MPH SHIFTING
TO THE NORTHWEST IN THE AFTERNOON. CHANCE OF PRECIPITATION
60 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN LIKELY IN THE EVENING,
THEN CHANCE OF RAIN AFTER MIDNIGHT. LOWS IN THE UPPER 30S. CHANCE
OF RAIN 70 PERCENT.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
MORNING. HIGHS IN THE LOWER 60S.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE MID
40S. HIGHS IN THE MID 70S.
TEMPERATURE / PRECIPITATION
GREAT FALLS ARPT 52 29 63 / 10 0 30
MTZ313-182200-
JUDITH BASIN COUNTY AND JUDITH GAP-
INCLUDING THE CITIES OF RAYNESFORD, GEYSER, STANFORD, WINDHAM,
BENCHLAND, HOBSON, AND MOCCASIN
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW EARLY
IN THE MORNING, THEN MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW
SHOWERS LATE IN THE MORNING. MOSTLY SUNNY IN THE AFTERNOON. HIGHS
IN THE MID 40S. NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
35 MPH. CHANCE OF SNOW 20 PERCENT.
TONIGHT
MOSTLY CLEAR. LOWS IN THE MID 20S. EAST WINDS 5 TO
10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
TUESDAY
NOT AS COOL. SUNNY IN THE MORNING, THEN PARTLY SUNNY
WITH A 20 PERCENT CHANCE OF RAIN IN THE AFTERNOON. HIGHS IN THE
UPPER 50S. WEST WINDS 5 TO 10 MPH.
TUESDAY NIGHT
NOT AS COOL. PARTLY CLOUDY. LOWS IN THE UPPER
30S. SOUTHWEST WINDS UP TO 15 MPH.
WEDNESDAY
MOSTLY SUNNY IN THE MORNING, THEN MOSTLY CLOUDY WITH
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS IN THE UPPER 50S. WEST WINDS 5 TO 15 MPH. CHANCE
OF PRECIPITATION 70 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF RAIN AFTER
MIDNIGHT. LOWS IN THE MID 30S. CHANCE OF PRECIPITATION
70 PERCENT.
THURSDAY
PARTLY SUNNY. CHANCE OF RAIN IN THE MORNING, THEN
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE
UPPER 50S. CHANCE OF PRECIPITATION 40 PERCENT.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S.
FRIDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE MID 60S.
FRIDAY NIGHT AND SATURDAY
PARTLY CLOUDY. LOWS IN THE LOWER
40S. HIGHS IN THE LOWER 70S.
SATURDAY NIGHT AND SUNDAY
PARTLY CLOUDY. LOWS IN THE MID 40S.
HIGHS IN THE LOWER 70S.
MTZ314-182200-
FERGUS COUNTY BELOW 4500FT-
INCLUDING THE CITIES OF HILGER AND LEWISTOWN
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY CLOUDY. A 20 PERCENT CHANCE OF SNOW EARLY
IN THE MORNING. HIGHS 45 TO 51. NORTHWEST WINDS 5 TO 15 MPH.
GUSTS UP TO 35 MPH IN THE MORNING.
TONIGHT
MOSTLY CLEAR. LOWS IN THE MID 20S. EAST WINDS UP TO
10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
IN THE AFTERNOON. HIGHS IN THE LOWER 60S. SOUTHWEST WINDS UP TO
10 MPH.
TUESDAY NIGHT
NOT AS COOL. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. LOWS AROUND 40. SOUTHWEST WINDS 5 TO
10 MPH.
WEDNESDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 60 TO 66. WEST
WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE OF
PRECIPITATION 50 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN LIKELY IN THE EVENING,
THEN CHANCE OF RAIN AFTER MIDNIGHT. LOWS IN THE UPPER 30S. CHANCE
OF RAIN 70 PERCENT.
THURSDAY
MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF RAIN. HIGHS
59 TO 65.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
FRIDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 65 TO 71.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE MID
40S. HIGHS 71 TO 80.
TEMPERATURE / PRECIPITATION
LEWISTOWN 46 23 59 / 40 0 30
MTZ315-182200-
UPPER BLACKFOOT AND MACDONALD PASS-
INCLUDING THE CITIES OF MARYSVILLE, LINCOLN, FLESHER PASS,
AND MACDONALD PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF SNOW
SHOWERS EARLY IN THE AFTERNOON. CHANCE OF SNOW SHOWERS AND RAIN
SHOWERS LATE IN THE AFTERNOON. HIGHS 41 TO 49. NORTH WINDS UP TO
10 MPH. CHANCE OF PRECIPITATION 50 PERCENT.
TONIGHT
PARTLY CLOUDY. LOWS IN THE MID 20S. WEST WINDS UP TO
10 MPH.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
IN THE AFTERNOON. HIGHS 49 TO 57. WEST WINDS 5 TO 15 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S. WEST WINDS
UP TO 15 MPH. GUSTS UP TO 30 MPH IN THE EVENING.
WEDNESDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 49 TO 59. WEST
WINDS UP TO 15 MPH. CHANCE OF PRECIPITATION 50 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN SHOWERS, SNOW LIKELY AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF
RAIN AND SNOW AFTER MIDNIGHT. LOWS IN THE MID 30S. CHANCE OF
PRECIPITATION 70 PERCENT.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN AND SNOW IN
THE MORNING. HIGHS 50 TO 60.
THURSDAY NIGHT THROUGH FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE
UPPER 30S. HIGHS 57 TO 65.
SATURDAY AND SATURDAY NIGHT
PARTLY CLOUDY. HIGHS 62 TO 70.
LOWS IN THE LOWER 40S.
SUNDAY
SUNNY. HIGHS 63 TO 71.
MTZ316-182200-
GATES OF THE MOUNTAINS-
INCLUDING THE CITIES OF CANYON CREEK, WOLF CREEK, AND CRAIG
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. PATCHY FOG EARLY IN
THE MORNING. A 20 PERCENT CHANCE OF RAIN SHOWERS LATE IN THE
AFTERNOON. HIGHS 47 TO 53. NORTH WINDS UP TO 10 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 20S. SOUTHWEST WINDS
5 TO 10 MPH. GUSTS UP TO 25 MPH AFTER MIDNIGHT.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. SLIGHT CHANCE OF RAIN AND
SNOW IN THE MORNING, THEN SLIGHT CHANCE OF RAIN IN THE AFTERNOON.
HIGHS 56 TO 62. SOUTHWEST WINDS 5 TO 15 MPH. CHANCE OF
PRECIPITATION 20 PERCENT.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. SOUTHWEST
WINDS UP TO 15 MPH.
WEDNESDAY
MOSTLY SUNNY IN THE MORNING, THEN MOSTLY CLOUDY WITH
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS 55 TO 63. SOUTHWEST WINDS UP TO 10 MPH SHIFTING
TO THE NORTHWEST IN THE AFTERNOON. GUSTS UP TO 25 MPH. CHANCE OF
PRECIPITATION 60 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN LIKELY IN THE EVENING,
THEN CHANCE OF RAIN AND SNOW AFTER MIDNIGHT. LOWS IN THE UPPER
30S. CHANCE OF PRECIPITATION 70 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS 56 TO 64.
LOWS AROUND 40.
FRIDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS 61 TO 69.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE MID
40S. HIGHS 67 TO 77.
MTZ317-182200-
LITTLE BELT AND HIGHWOOD MOUNTAINS-
INCLUDING THE CITIES OF MONARCH, NEIHART, AND KINGS HILL PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
PATCHY FOG EARLY IN THE MORNING. MOSTLY CLOUDY
WITH A 20 PERCENT CHANCE OF SNOW IN THE MORNING, THEN MOSTLY
SUNNY IN THE AFTERNOON. HIGHS 36 TO 44. NORTH WINDS 5 TO 15 MPH.
GUSTS UP TO 45 MPH DECREASING TO 30 MPH IN THE AFTERNOON.
TONIGHT
MOSTLY CLEAR. LOWS 20 TO 28. EAST WINDS 5 TO 10 MPH
SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT. GUSTS UP TO 25 MPH.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. SLIGHT CHANCE OF SNOW IN
THE MORNING, THEN SLIGHT CHANCE OF RAIN AND SNOW IN THE
AFTERNOON. HIGHS 48 TO 56. WEST WINDS 5 TO 15 MPH. CHANCE OF
PRECIPITATION 20 PERCENT.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 31 TO 39. SOUTHWEST WINDS
5 TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
MOSTLY SUNNY IN THE MORNING, THEN MOSTLY CLOUDY WITH
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS 48 TO 56. WEST WINDS 5 TO 15 MPH WITH GUSTS TO
AROUND 30 MPH. CHANCE OF PRECIPITATION 70 PERCENT.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN SHOWERS, SNOW LIKELY AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF
RAIN AND SNOW AFTER MIDNIGHT. LIGHT SNOW ACCUMULATIONS. LOWS
30 TO 36. CHANCE OF PRECIPITATION 70 PERCENT.
THURSDAY
PARTLY SUNNY. CHANCE OF RAIN AND SNOW IN THE MORNING,
THEN CHANCE OF RAIN SHOWERS, SNOW SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS 48 TO 56. CHANCE OF
PRECIPITATION 40 PERCENT.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING
MOSTLY CLOUDY. LOWS 33 TO 39.
FRIDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 55 TO 61. CHANCE OF
PRECIPITATION 40 PERCENT.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS 36 TO 47.
HIGHS 60 TO 70.
MTZ318-182200-
SNOWY AND JUDITH MOUNTAINS-
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY CLOUDY. CHANCE OF SNOW EARLY IN THE
MORNING, THEN CHANCE OF SNOW SHOWERS LATE IN THE MORNING. SLIGHT
CHANCE OF SNOW SHOWERS IN THE AFTERNOON. HIGHS 35 TO 43.
NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 45 MPH IN THE MORNING.
CHANCE OF SNOW 50 PERCENT.
TONIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 20S. NORTH WINDS UP TO
10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT. GUSTS UP TO 25 MPH.
TUESDAY
NOT AS COOL. SUNNY IN THE MORNING, THEN PARTLY SUNNY
WITH A 50 PERCENT CHANCE OF RAIN IN THE AFTERNOON. HIGHS 49 TO
57. SOUTHWEST WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
TUESDAY NIGHT
NOT AS COOL. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. LOWS IN THE MID 30S. SOUTHWEST WINDS UP
TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 50 TO 58. WEST
WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE OF
PRECIPITATION 50 PERCENT.
WEDNESDAY NIGHT
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN RAIN AND SNOW LIKELY AFTER
MIDNIGHT. LIGHT SNOW ACCUMULATIONS. LOWS IN THE MID 30S. CHANCE
OF PRECIPITATION 70 PERCENT.
THURSDAY
PARTLY SUNNY. CHANCE OF RAIN AND SNOW IN THE MORNING,
THEN SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS 49 TO
57. CHANCE OF PRECIPITATION 40 PERCENT.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S.
FRIDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 56 TO 62.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE
LOWER 40S. HIGHS 63 TO 69.
SUNDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 66 TO 72.
MTZ319-182200-
HELENA VALLEY-
INCLUDING THE CITY OF HELENA
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. PATCHY FOG EARLY IN THE MORNING.
HIGHS IN THE MID 50S. NORTH WINDS 5 TO 10 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 20S. NORTHWEST WINDS
5 TO 10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. SOUTH WINDS 5 TO 10 MPH
SHIFTING TO THE WEST IN THE AFTERNOON.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. SOUTHWEST
WINDS UP TO 10 MPH.
WEDNESDAY
PARTLY SUNNY. A 30 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE MID 60S. WEST WINDS UP TO 10 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN LIKELY IN THE EVENING,
THEN CHANCE OF RAIN AFTER MIDNIGHT. LOWS IN THE MID 30S. CHANCE
OF RAIN 70 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE MID
60S. LOWS IN THE UPPER 30S.
FRIDAY AND FRIDAY NIGHT
PARTLY CLOUDY. HIGHS AROUND 70. LOWS
AROUND 40.
SATURDAY THROUGH SUNDAY
PARTLY CLOUDY. HIGHS IN THE UPPER 70S.
LOWS IN THE MID 40S.
TEMPERATURE / PRECIPITATION
HELENA 55 29 62 / 10 10 20
MTZ320-182200-
BIG BELT, BRIDGER AND CASTLE MOUNTAINS-
INCLUDING THE CITIES OF TRIDENT, MAUDLOW, BATTLE RIDGE PASS,
BOZEMAN PASS, AND DEEP CREEK PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. SLIGHT CHANCE OF SNOW EARLY IN THE
MORNING. SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON. HIGHS
36 TO 46. NORTH WINDS 5 TO 15 MPH. GUSTS UP TO 40 MPH DECREASING
TO 30 MPH IN THE AFTERNOON. CHANCE OF SNOW 20 PERCENT.
TONIGHT
MOSTLY CLEAR. LOWS 21 TO 27. NORTHEAST WINDS UP TO
10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT. GUSTS UP TO 25 MPH.
TUESDAY
NOT AS COOL. SUNNY IN THE MORNING, THEN PARTLY SUNNY
WITH A 20 PERCENT CHANCE OF RAIN IN THE AFTERNOON. HIGHS 48 TO
56. WEST WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S. SOUTHWEST
WINDS UP TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
MOSTLY SUNNY. A 50 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS 49 TO 59. WEST WINDS UP TO 15 MPH WITH GUSTS TO
AROUND 35 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF RAIN AND
SNOW AFTER MIDNIGHT. LIGHT SNOW ACCUMULATIONS. LOWS IN THE MID
30S. CHANCE OF PRECIPITATION 70 PERCENT.
THURSDAY
PARTLY SUNNY. A 50 PERCENT CHANCE OF RAIN AND SNOW IN
THE MORNING. HIGHS 48 TO 58.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 55 TO 63.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER
40S. HIGHS 60 TO 73.
MTZ321-182200-
MEAGHER COUNTY VALLEYS-
INCLUDING THE CITIES OF MARTINSDALE, CHECKERBOARD, RINGLING,
AND WHITE SULPHUR SPRINGS
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF SNOW EARLY
IN THE MORNING. HIGHS IN THE MID 40S. NORTH WINDS 10 TO 15 MPH
WITH GUSTS TO AROUND 30 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 20S. NORTHEAST WINDS
UP TO 10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
IN THE AFTERNOON. HIGHS IN THE MID 50S. WEST WINDS 5 TO 15 MPH.
TUESDAY NIGHT
NOT AS COLD. PARTLY CLOUDY. LOWS IN THE MID 30S.
WEST WINDS UP TO 10 MPH. GUSTS UP TO 25 MPH IN THE EVENING.
WEDNESDAY
MOSTLY SUNNY. A 50 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE UPPER 50S. SOUTHWEST WINDS UP TO 10 MPH
SHIFTING TO THE WEST IN THE AFTERNOON. GUSTS UP TO 30 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF RAIN AND
SNOW AFTER MIDNIGHT. LOWS IN THE MID 30S. CHANCE OF PRECIPITATION
70 PERCENT.
THURSDAY
PARTLY SUNNY. CHANCE OF SNOW AND SLIGHT CHANCE OF
RAIN IN THE MORNING, THEN SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. HIGHS IN THE UPPER 50S. CHANCE OF PRECIPITATION
50 PERCENT.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE MID 30S.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE LOWER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS AROUND 40.
HIGHS IN THE LOWER 70S.
MTZ322-182200-
ELKHORN AND BOULDER MOUNTAINS-
INCLUDING THE CITIES OF MONTANA CITY, CLANCY, BOULDER, CORBIN,
WICKES, ELK PARK PASS, AND HOMESTAKE PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE
OF SNOW SHOWERS LATE IN THE AFTERNOON. HIGHS 38 TO 48. NORTH
WINDS 5 TO 15 MPH. GUSTS UP TO 40 MPH DECREASING TO 30 MPH IN THE
AFTERNOON.
TONIGHT
MOSTLY CLEAR. LOWS 21 TO 27. NORTHWEST WINDS UP TO
10 MPH SHIFTING TO THE WEST AFTER MIDNIGHT. GUSTS UP TO 25 MPH.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
AND SNOW IN THE AFTERNOON. HIGHS 47 TO 57. WEST WINDS UP TO
10 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 28 TO 36. WEST WINDS UP TO
10 MPH.
WEDNESDAY
MOSTLY SUNNY. A 30 PERCENT CHANCE OF RAIN AND SNOW
IN THE AFTERNOON. HIGHS 49 TO 59. WEST WINDS UP TO 10 MPH WITH
GUSTS TO AROUND 25 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF RAIN AND
SNOW AFTER MIDNIGHT. LOWS 30 TO 36. CHANCE OF PRECIPITATION
70 PERCENT.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN AND SNOW IN
THE MORNING. HIGHS 49 TO 59.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 33 TO 39.
FRIDAY
WARMER. MOSTLY SUNNY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS 55 TO 65.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS 35 TO 44.
HIGHS 61 TO 74.
MTZ323-182200-
CANYON FERRY AREA-
INCLUDING THE CITIES OF TOSTON, TOWNSEND, AND WINSTON
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS AROUND 50. NORTH WINDS 5 TO
15 MPH WITH GUSTS TO AROUND 30 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 20S. NORTH WINDS 5 TO
10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS AROUND 60. SOUTH WINDS UP TO 10 MPH SHIFTING TO
THE WEST IN THE AFTERNOON.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 34 TO 40. NORTHWEST WINDS
5 TO 10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
WEDNESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. SOUTHWEST WINDS UP TO 5 MPH
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLOUDY. RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF RAIN AFTER
MIDNIGHT. LOWS IN THE UPPER 30S. CHANCE OF PRECIPITATION
70 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE LOWER
60S. LOWS AROUND 40.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE MID
40S. HIGHS IN THE MID 70S.
MTZ324-182200-
MISSOURI HEADWATERS-
INCLUDING THE CITIES OF HARRISON, THREE FORKS, WILLOW CREEK,
PONY, AND WHITEHALL
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS 47 TO 53. NORTH WINDS 5 TO
15 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE MID 20S. NORTH WINDS UP TO
10 MPH SHIFTING TO THE SOUTHWEST AFTER MIDNIGHT.
TUESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS AROUND 60. WEST WINDS UP TO 10 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 30S. WEST WINDS UP TO 10 MPH.
WEDNESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. WEST WINDS UP TO 10 MPH.
WEDNESDAY NIGHT
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN RAIN LIKELY AFTER MIDNIGHT.
LOWS IN THE UPPER 30S. CHANCE OF PRECIPITATION 70 PERCENT.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
MORNING. HIGHS IN THE LOWER 60S.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER
40S. HIGHS IN THE UPPER 70S.
MTZ325-182200-
MADISON RIVER VALLEY-
INCLUDING THE CITIES OF CAMERON, ENNIS, JEFFERS, MCALLISTER,
AND NORRIS
647 AM MDT MON MAY 18 2026
REST OF TODAY
BREEZY. PARTLY SUNNY UNTIL LATE AFTERNOON THEN
CLEARING. A 20 PERCENT CHANCE OF SNOW IN THE MORNING. HIGHS IN
THE MID 40S. NORTH WINDS 10 TO 25 MPH WITH GUSTS TO AROUND
40 MPH.
TONIGHT
MOSTLY CLEAR. LOWS 20 TO 26. NORTH WINDS 5 TO 10 MPH
WITH GUSTS TO AROUND 30 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
TUESDAY
NOT AS COOL. SUNNY IN THE MORNING, THEN PARTLY SUNNY
WITH A 20 PERCENT CHANCE OF RAIN IN THE AFTERNOON. HIGHS IN THE
UPPER 50S. SOUTHWEST WINDS 5 TO 10 MPH.
TUESDAY NIGHT
NOT AS COLD. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. LOWS IN THE MID 30S. SOUTH WINDS UP TO
10 MPH.
WEDNESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. SOUTH WINDS UP TO 10 MPH
SHIFTING TO THE WEST IN THE AFTERNOON.
WEDNESDAY NIGHT
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN RAIN LIKELY AFTER MIDNIGHT.
LOWS IN THE MID 30S. CHANCE OF PRECIPITATION 70 PERCENT.
THURSDAY
PARTLY SUNNY. A 40 PERCENT CHANCE OF RAIN AND SNOW IN
THE MORNING. HIGHS IN THE UPPER 50S.
THURSDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF RAIN
AFTER MIDNIGHT. LOWS IN THE UPPER 30S.
FRIDAY
PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE MID 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER
40S. HIGHS IN THE MID 70S.
MTZ326-182200-
GALLATIN VALLEY-
INCLUDING THE CITIES OF BOZEMAN AND GALLATIN GATEWAY
647 AM MDT MON MAY 18 2026
REST OF TODAY
PARTLY SUNNY. PATCHY FOG EARLY IN THE MORNING.
SLIGHT CHANCE OF SNOW IN THE MORNING, THEN SLIGHT CHANCE OF SNOW
SHOWERS EARLY IN THE AFTERNOON. HIGHS IN THE UPPER 40S. NORTHWEST
WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 25 MPH. CHANCE OF SNOW
20 PERCENT.
TONIGHT
MOSTLY CLEAR. LOWS IN THE MID 20S. EAST WINDS 5 TO
10 MPH SHIFTING TO THE SOUTHEAST AFTER MIDNIGHT.
TUESDAY
SUNNY IN THE MORNING THEN BECOMING PARTLY SUNNY. HIGHS
IN THE UPPER 50S. SOUTHWEST WINDS UP TO 5 MPH SHIFTING TO THE
WEST IN THE AFTERNOON.
TUESDAY NIGHT
NOT AS COOL. PARTLY CLOUDY. LOWS IN THE MID 30S.
WEST WINDS UP TO 10 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.
WEDNESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN IN THE
AFTERNOON. HIGHS IN THE LOWER 60S. SOUTH WINDS UP TO 5 MPH
SHIFTING TO THE WEST IN THE AFTERNOON.
WEDNESDAY NIGHT
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN RAIN LIKELY AFTER MIDNIGHT.
LOWS IN THE MID 30S. CHANCE OF PRECIPITATION 70 PERCENT.
THURSDAY
PARTLY SUNNY. A 50 PERCENT CHANCE OF RAIN IN THE
MORNING. HIGHS AROUND 60.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S.
FRIDAY
PARTLY SUNNY. HIGHS IN THE UPPER 60S.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER
40S. HIGHS IN THE MID 70S.
TEMPERATURE / PRECIPITATION
BOZEMAN AIRPORT 51 22 60 / 10 0 10
BOZEMAN MSU 46 24 58 / 20 10 10
MTZ330-182200-
GALLATIN AND MADISON COUNTY MOUNTAINS AND CENTENNIAL MOUNTAINS-
INCLUDING THE CITIES OF BIG SKY, WEST YELLOWSTONE, TARGHEE PASS,
AND RAYNOLDS PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
BREEZY. PARTLY SUNNY. SLIGHT CHANCE OF SNOW IN
THE MORNING, THEN SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON.
HIGHS 30 TO 42. NORTH WINDS 10 TO 25 MPH. GUSTS UP TO 60 MPH
DECREASING TO 40 MPH IN THE AFTERNOON. CHANCE OF SNOW 20 PERCENT.
TONIGHT
MOSTLY CLEAR. LOWS 16 TO 22. NORTH WINDS 5 TO 10 MPH
WITH GUSTS TO AROUND 35 MPH SHIFTING TO THE SOUTHWEST AFTER
MIDNIGHT.
TUESDAY
NOT AS COOL. SUNNY IN THE MORNING, THEN PARTLY SUNNY
WITH A 20 PERCENT CHANCE OF RAIN AND SNOW IN THE AFTERNOON. HIGHS
42 TO 52. SOUTHWEST WINDS UP TO 15 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING
PARTLY CLOUDY. LOWS 27 TO 33. SOUTHWEST WINDS UP TO 10 MPH WITH
GUSTS TO AROUND 25 MPH.
WEDNESDAY
NOT AS COOL. SUNNY IN THE MORNING, THEN PARTLY SUNNY
WITH A 20 PERCENT CHANCE OF RAIN AND SNOW IN THE AFTERNOON. HIGHS
46 TO 58. SOUTHWEST WINDS UP TO 15 MPH.
WEDNESDAY NIGHT
RAIN SHOWERS, SNOW SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SNOW LIKELY AND
CHANCE OF RAIN AFTER MIDNIGHT. LIGHT SNOW ACCUMULATIONS. LOWS
29 TO 35. CHANCE OF PRECIPITATION 70 PERCENT.
THURSDAY
PARTLY SUNNY. A 50 PERCENT CHANCE OF SNOW AND RAIN IN
THE MORNING. HIGHS 44 TO 56.
THURSDAY NIGHT
PARTLY CLOUDY. A 20 PERCENT CHANCE OF SNOW
AFTER MIDNIGHT. LOWS 29 TO 35.
FRIDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS 52 TO 62.
FRIDAY NIGHT THROUGH SUNDAY
PARTLY CLOUDY. LOWS 32 TO 42.
HIGHS 58 TO 72.
TEMPERATURE / PRECIPITATION
WEST YELLOWSTONE 41 16 51 / 10 10 20
MTZ327-182200-
NORTHWEST BEAVERHEAD COUNTY-
INCLUDING THE CITIES OF DEWEY, WISDOM, WISE RIVER, BIG HOLE PASS,
AND CHIEF JOSEPH PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS 36 TO 46. NORTH WINDS 5 TO
15 MPH. GUSTS UP TO 40 MPH DECREASING TO 30 MPH IN THE AFTERNOON.
TONIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 20S. NORTH WINDS UP TO
10 MPH WITH GUSTS TO AROUND 25 MPH SHIFTING TO THE WEST AFTER
MIDNIGHT.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
AND SNOW IN THE AFTERNOON. HIGHS 45 TO 53. WEST WINDS UP TO
15 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 20S. WEST WINDS
UP TO 10 MPH WITH GUSTS TO AROUND 25 MPH.
WEDNESDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN AND SNOW
IN THE AFTERNOON. HIGHS 47 TO 57. SOUTHWEST WINDS UP TO 5 MPH
SHIFTING TO THE WEST 5 TO 15 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY
WITH SLIGHT CHANCE OF RAIN AND SNOW AFTER MIDNIGHT. LOWS IN THE
LOWER 30S. CHANCE OF PRECIPITATION 50 PERCENT.
THURSDAY AND THURSDAY NIGHT
PARTLY CLOUDY. HIGHS 49 TO 59.
LOWS IN THE LOWER 30S.
FRIDAY AND FRIDAY NIGHT
PARTLY CLOUDY. HIGHS 54 TO 64. LOWS IN
THE MID 30S.
SATURDAY THROUGH SUNDAY
PARTLY CLOUDY. HIGHS 59 TO 71. LOWS IN
THE UPPER 30S.
MTZ328-182200-
BEAVERHEAD AND WESTERN MADISON BELOW 6000FT-
INCLUDING THE CITIES OF BANNACK, DILLON, GLEN, AND WATERLOO
647 AM MDT MON MAY 18 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS 43 TO 49. NORTH WINDS 10 TO
20 MPH WITH GUSTS TO AROUND 45 MPH.
TONIGHT
MOSTLY CLEAR. LOWS IN THE MID 20S. NORTHEAST WINDS
5 TO 10 MPH WITH GUSTS TO AROUND 30 MPH SHIFTING TO THE SOUTHWEST
AFTER MIDNIGHT.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
IN THE AFTERNOON. HIGHS 54 TO 60. SOUTHWEST WINDS UP TO 15 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 30S. SOUTHWEST WINDS UP TO
10 MPH.
WEDNESDAY
SUNNY IN THE MORNING THEN BECOMING PARTLY SUNNY.
HIGHS 58 TO 64. SOUTHWEST WINDS UP TO 5 MPH SHIFTING TO THE WEST
5 TO 15 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF
RAIN AFTER MIDNIGHT. LOWS IN THE MID 30S. CHANCE OF PRECIPITATION
50 PERCENT.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN AND SNOW IN
THE MORNING. HIGHS 58 TO 64.
THURSDAY NIGHT THROUGH FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE
UPPER 30S. HIGHS 63 TO 69.
SATURDAY THROUGH SUNDAY
PARTLY CLOUDY. HIGHS 70 TO 79. LOWS IN
THE LOWER 40S.
TEMPERATURE / PRECIPITATION
DILLON 48 23 60 / 10 10 20
MTZ329-182200-
RUBY MOUNTAINS AND SOUTHERN BEAVERHEAD MOUNTAINS-
INCLUDING THE CITY OF MONIDA PASS
647 AM MDT MON MAY 18 2026
REST OF TODAY
WINDY. MOSTLY SUNNY. A 20 PERCENT CHANCE OF SNOW
EARLY IN THE MORNING. HIGHS 36 TO 44. NORTH WINDS 15 TO 30 MPH.
GUSTS UP TO 65 MPH DECREASING TO 55 MPH IN THE AFTERNOON.
TONIGHT
MOSTLY CLEAR. LOWS AROUND 20. NORTH WINDS 5 TO 10 MPH
WITH GUSTS TO AROUND 35 MPH SHIFTING TO THE SOUTHWEST AFTER
MIDNIGHT.
TUESDAY
NOT AS COOL. MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN
AND SNOW IN THE AFTERNOON. HIGHS 46 TO 54. SOUTHWEST WINDS UP TO
10 MPH SHIFTING TO THE WEST IN THE AFTERNOON.
TUESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING
PARTLY CLOUDY. LOWS 26 TO 32. SOUTHWEST WINDS 5 TO 15 MPH
DECREASING TO UP TO 5 MPH AFTER MIDNIGHT.
WEDNESDAY
SUNNY IN THE MORNING THEN BECOMING PARTLY SUNNY.
HIGHS 50 TO 58. SOUTHWEST WINDS UP TO 5 MPH INCREASING TO WEST
10 TO 15 MPH WITH GUSTS TO AROUND 30 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE
OF RAIN AND SNOW AFTER MIDNIGHT. LOWS IN THE LOWER 30S. CHANCE OF
PRECIPITATION 50 PERCENT.
THURSDAY
MOSTLY SUNNY. A 20 PERCENT CHANCE OF RAIN AND SNOW IN
THE MORNING. HIGHS 50 TO 58.
THURSDAY NIGHT THROUGH FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE
MID 30S. HIGHS 57 TO 63.
SATURDAY
SUNNY. HIGHS 62 TO 70.
SATURDAY NIGHT AND SUNDAY
BREEZY. PARTLY CLOUDY. LOWS IN THE
UPPER 30S. HIGHS 65 TO 73.
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