FPUS65 KTFX 181833
AFPTFX

Central and Southwest Montana Area Forecast
National Weather Service Great Falls MT
1233 PM MDT Mon May 18 2026

MTZ301>314-316>318-190000-
Central Montana-
National Weather Service Great Falls MT
1233 PM MDT Mon May 18 2026


.REST OF TODAY...Partly cloudy. Highs 50 to 55...35 to 45 in the
mountains. 
.TONIGHT...Partly cloudy. Lows 25 to 30. 
.TUESDAY...Increasing clouds. Slight chance of showers and
thunderstorms in the afternoon and evening. Highs 60 to 65...
45 to 55 in the mountains. 
.WEDNESDAY...Rain showers and slight chance of thunderstorms.
Lows 35 to 40. 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. 

$$

MTZ315-319>330-190000-
Southwest Montana-
National Weather Service Great Falls MT
1233 PM MDT Mon May 18 2026


.REST OF TODAY...Partly cloudy. Highs 45 to 55...35 to 45 in the
mountains. 
.TONIGHT...Mostly clear. Lows 20 to 30...15 to 25 in the
mountains. 
.TUESDAY...Sunny then becoming partly cloudy in the afternoon
then becoming mostly cloudy. Slight chance of rain showers in the
afternoon and evening. Highs 55 to 60...45 to 55 in the
mountains. 
.WEDNESDAY...Rain showers and slight chance of thunderstorms.
Lows 30 to 35. 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. 

$$