711
FPUS65 KTFX 190100
SFPMT
STATE FORECAST FOR MONTANA
NATIONAL WEATHER SERVICE GREAT FALLS MT
700 PM MDT MON MAY 18 2026
MTZ001>007-043-191000-
WEST OF THE CONTINENTAL DIVIDE-
NATIONAL WEATHER SERVICE MISSOULA MT
700 PM MDT MON MAY 18 2026
...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT
TUESDAY FOR FLATHEAD/MISSION VALLEYS...LOWER CLARK FORK
REGION...MISSOULA/BITTERROOT VALLEYS...BITTERROOT/SAPPHIRE
MOUNTAINS...
TONIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN. WIDESPREAD
FROST. LOWS IN THE MID 20S TO LOWER 30S.
TUESDAY
PARTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS. AREAS OF FROST. HIGHS IN THE 60S.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE 30S.
WEDNESDAY
MOSTLY CLOUDY. A CHANCE OF RAIN IN THE MORNING, THEN
RAIN SHOWERS LIKELY IN THE AFTERNOON AND EVENING. HIGHS IN THE
60S.
THURSDAY
PARTLY CLOUDY WITH A CHANCE OF RAIN. LOWS IN THE 30S.
HIGHS IN THE 60S.
FRIDAY
PARTLY CLOUDY. LOWS IN THE 30S TO LOWER 40S. HIGHS IN
THE UPPER 60S TO MID 70S.
SATURDAY
PARTLY CLOUDY. LOWS IN THE MID 30S TO LOWER 40S.
HIGHS IN THE 70S.
MTZ301>314-316>318-191000-
CENTRAL MONTANA-
NATIONAL WEATHER SERVICE GREAT FALLS MT
700 PM MDT MON MAY 18 2026
TONIGHT
PARTLY CLOUDY. LOWS 25 TO 30.
TUESDAY
INCREASING CLOUDS. SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS 60 TO 65...45 TO 55 IN THE MOUNTAINS.
TUESDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
LOWS 35 TO 40.
WEDNESDAY
MOSTLY CLOUDY. RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. HIGHS 50 TO 60.
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.
SATURDAY
PARTLY CLOUDY. LOWS 40 TO 45. HIGHS 70 TO 80.
MTZ315-319>330-191000-
SOUTHWEST MONTANA-
NATIONAL WEATHER SERVICE GREAT FALLS MT
700 PM MDT MON MAY 18 2026
TONIGHT...MOSTLY CLEAR. LOWS 20 TO 30
15 TO 25 IN THE
MOUNTAINS.
TUESDAY...PARTLY CLOUDY. HIGHS 55 TO 60
45 TO 55 IN THE
MOUNTAINS.
TUESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW SHOWERS. LOWS 30 TO
40...25 TO 35 IN THE MOUNTAINS.
WEDNESDAY
MOSTLY CLOUDY. RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. HIGHS 45 TO 55.
THURSDAY
RAIN AND SNOW LIKELY. LOWS 30 TO 35. HIGHS 50 TO 60.
FRIDAY
PARTLY CLOUDY. LOWS 30 TO 35. HIGHS 55 TO 65.
SATURDAY
PARTLY CLOUDY. LOWS 35 TO 40. HIGHS 65 TO 75.
MTZ016>027-059>062-191000-
NORTHEAST MONTANA-
NATIONAL WEATHER SERVICE GLASGOW MT
700 PM MDT MON MAY 18 2026
TONIGHT
PARTLY CLOUDY. LOWS IN THE MID TO UPPER 20S.
TUESDAY
SUNNY. HIGHS IN THE LOWER TO MID 60S.
TUESDAY NIGHT
MOSTLY CLOUDY. LOWS NEAR 40.
WEDNESDAY
MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON AND EVENING. HIGHS NEAR
70.
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.
SATURDAY
PARTLY CLOUDY. HIGHS IN THE MID TO UPPER 70S. LOWS IN
THE LOWER TO MID 40S.
MTZ028>042-056>058-063>068-191000-
SOUTH CENTRAL AND SOUTHEAST MONTANA-
NATIONAL WEATHER SERVICE BILLINGS MT
700 PM MDT MON MAY 18 2026
TONIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 20S TO THE LOWER 30S.
TUESDAY
SUNNY. HIGHS IN THE UPPER 50S TO THE UPPER 60S.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 30S TO THE
LOWER 40S.
WEDNESDAY
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS. HIGHS IN THE
MID 60S TO LOWER 70S.
WEDNESDAY NIGHT
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
WEST...AND CHANCE OF SHOWERS EAST. LOWS IN THE MID 30S TO THE MID
40S.
THURSDAY
MOSTLY CLOUDY. SHOWERS, SNOW SHOWERS LIKELY AND
SLIGHT CHANCE OF THUNDERSTORMS WEST...AND CHANCE OF SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS EAST. HIGHS IN THE MID 50S TO THE
MID 60S.
THURSDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
LOWS IN THE LOWER 30S TO THE LOWER 40S.
FRIDAY
MOSTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS. HIGHS IN
THE LOWER 60S TO THE LOWER 70S.
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S TO THE MID
40S.
SATURDAY
SUNNY. HIGHS IN THE LOWER 70S TO THE LOWER 80S.
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