FPUS65 KTFX 182138
AFPTFX

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

MTZ301>314-316>318-191200-
Central Montana-
National Weather Service Great Falls MT
337 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>330-191200-
Southwest Montana-
National Weather Service Great Falls MT
337 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. 

$$