040
FPUS65 KTFX 181300
SFPMT
STATE FORECAST FOR MONTANA
NATIONAL WEATHER SERVICE GREAT FALLS MT
700 AM MDT MON MAY 18 2026
MTZ001>007-043-182200-
WEST OF THE CONTINENTAL DIVIDE-
NATIONAL WEATHER SERVICE MISSOULA MT
700 AM MDT MON MAY 18 2026
...FROST ADVISORY IN EFFECT UNTIL 8 AM MDT THIS MORNING FOR
KOOTENAI/CABINET REGION...LOWER CLARK FORK REGION...
...FROST ADVISORY IN EFFECT UNTIL 9 AM MDT THIS MORNING FOR
FLATHEAD/MISSION VALLEYS...MISSOULA/BITTERROOT VALLEYS...
TODAY
PARTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. WIDESPREAD FROST. HIGHS IN THE MID 50S
TO LOWER 60S.
TONIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN. WIDESPREAD
FROST. LOWS IN THE UPPER 20S TO MID 30S.
TUESDAY
PARTLY CLOUDY. AREAS OF FROST IN THE MORNING. HIGHS IN
THE 60S.
WEDNESDAY
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS. LOWS IN THE
30S. HIGHS IN THE 60S.
THURSDAY
PARTLY CLOUDY. LOWS IN THE 30S. HIGHS IN THE MID 60S
TO LOWER 70S.
FRIDAY
PARTLY CLOUDY. LOWS IN THE MID 30S TO LOWER 40S. HIGHS
IN THE UPPER 60S TO MID 70S.
MTZ301>314-316>318-182200-
CENTRAL MONTANA-
NATIONAL WEATHER SERVICE GREAT FALLS MT
700 AM MDT MON MAY 18 2026
REST OF TODAY
PARTLY CLOUDY. PATCHY FOG IN THE MORNING. HIGHS
45 TO 55...35 TO 45 IN THE MOUNTAINS.
TONIGHT
MOSTLY CLEAR. LOWS 25 TO 30.
TUESDAY
INCREASING CLOUDS. SLIGHT CHANCE OF RAIN IN THE
AFTERNOON AND EVENING. HIGHS 60 TO 65...45 TO 55 IN THE
MOUNTAINS.
WEDNESDAY
MOSTLY CLOUDY. CHANCE OF RAIN. LOWS 35 TO 40. HIGHS
55 TO 65.
THURSDAY
PARTLY CLOUDY. CHANCE OF RAIN. LOWS 35 TO 40. HIGHS
55 TO 65.
FRIDAY
PARTLY CLOUDY. LOWS 35 TO 40. HIGHS 60 TO 70.
MTZ315-319>330-182200-
SOUTHWEST MONTANA-
NATIONAL WEATHER SERVICE GREAT FALLS MT
700 AM MDT MON MAY 18 2026
REST OF TODAY
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW IN THE
MORNING. HIGHS 40 TO 50...30 TO 40 IN THE MOUNTAINS. GUSTS UP TO
35 MPH IN THE MORNING.
TONIGHT...MOSTLY CLEAR. LOWS 20 TO 30
15 TO 25 IN THE
MOUNTAINS.
TUESDAY
INCREASING CLOUDS IN THE AFTERNOON THEN BECOMING
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW IN THE AFTERNOON
AND EVENING. HIGHS 50 TO 60...40 TO 50 IN THE MOUNTAINS.
WEDNESDAY
PARTLY CLOUDY. CHANCE OF RAIN. LOWS 25 TO 35. HIGHS
50 TO 60.
THURSDAY
PARTLY CLOUDY. CHANCE OF RAIN AND SNOW. LOWS 30 TO
35. HIGHS 50 TO 60.
FRIDAY
PARTLY CLOUDY. LOWS 30 TO 40. HIGHS 55 TO 65.
MTZ016>027-059>062-182200-
NORTHEAST MONTANA-
NATIONAL WEATHER SERVICE GLASGOW MT
700 AM MDT MON MAY 18 2026
TODAY
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN SHOWERS.
HIGHS IN THE MID TO UPPER 40S.
TONIGHT
MOSTLY CLOUDY. LOWS IN THE MID 20S TO LOWER 30S.
TUESDAY
PARTLY CLOUDY. HIGHS IN THE LOWER TO MID 60S.
WEDNESDAY
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN SHOWERS.
HIGHS IN THE MID 60S TO LOWER 70S. LOWS NEAR 40.
THURSDAY
MOSTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS. HIGHS IN
THE LOWER TO MID 60S. LOWS NEAR 40.
FRIDAY
PARTLY CLOUDY. HIGHS IN THE MID 60S TO LOWER 70S. LOWS
NEAR 40.
MTZ028>042-056>058-063>068-182200-
SOUTH CENTRAL AND SOUTHEAST MONTANA-
NATIONAL WEATHER SERVICE BILLINGS MT
700 AM MDT MON MAY 18 2026
...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON MDT TODAY FOR
PORTIONS OF SOUTH CENTRAL MONTANA...
TODAY
CLOUDY. PATCHY BLOWING SNOW. SLIGHT CHANCE OF RAIN
SHOWERS AND SNOW SHOWERS. HIGHS IN THE MID 40S TO LOWER 50S.
TONIGHT
PARTLY CLOUDY. LOWS IN THE MID 20S TO AROUND 30.
TUESDAY
SUNNY. HIGHS IN THE UPPER 50S TO THE UPPER 60S.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S TO THE MID
40S.
WEDNESDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS. HIGHS IN THE
MID 60S TO LOWER 70S.
WEDNESDAY NIGHT
MOSTLY CLOUDY. SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS WEST...AND CHANCE OF SHOWERS EAST. LOWS
IN THE MID 30S TO THE MID 40S.
THURSDAY
PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. HIGHS IN THE UPPER 50S TO MID 60S.
THURSDAY NIGHT
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
LOWS IN THE MID 30S TO THE MID 40S.
FRIDAY...MOSTLY SUNNY. SLIGHT CHANCE OF THUNDERSTORMS WEST
AND
SLIGHT CHANCE OF SHOWERS EAST. HIGHS IN THE MID 60S TO THE MID
70S.
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