669 

FLUS45 KMSO 180621

AFPMSO



Area Forecast for Montana west of the Continental Divide

National Weather Service Missoula MT

1221 AM MDT Mon May 18 2026



MTZ001>007-043-190300-

West of the Continental Divide-

National Weather Service Missoula MT

1221 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. 



$$








838 

FPUS65 KTFX 180633

AFPTFX



Central and Southwest Montana Area Forecast

National Weather Service Great Falls MT

1233 AM MDT Mon May 18 2026



MTZ301>314-316>318-191200-

Central Montana-

National Weather Service Great Falls MT

1233 AM MDT Mon May 18 2026





.REST OF TONIGHT...Partly cloudy. Slight chance of snow after

midnight. Patchy fog. Highs 45 to 55...35 to 45 in the mountains.

Lows 25 to 30. 

.TUESDAY...Increasing clouds. Highs 60 to 65...45 to 55 in the

mountains. 

.TUESDAY NIGHT...Mostly cloudy in the evening then becoming

partly cloudy. Lows 35 to 40. 

.WEDNESDAY...Mostly cloudy. Chance of rain. 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. 

.SATURDAY...Partly cloudy. Lows 40 to 45. Highs 70 to 80. 



$$



MTZ315-319>330-191200-

Southwest Montana-

National Weather Service Great Falls MT

1233 AM MDT Mon May 18 2026





.REST OF TONIGHT...Partly cloudy. Slight chance of snow. Highs

40 to 50...30 to 40 in the mountains. Lows 20 to 30...15 to 25 in

the mountains. 

.TUESDAY...Increasing clouds. Slight chance of snow in the

afternoon. Highs 50 to 60...40 to 50 in the mountains. 

.TUESDAY NIGHT...Partly cloudy. Lows 25 to 35. 

.WEDNESDAY...Mostly cloudy. Rain showers likely and slight chance

of thunderstorms. 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. 

.SATURDAY...Partly cloudy. Lows 35 to 40. Highs 65 to 75. 



$$