FPUS65 KTFX 210938 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 337 AM MDT Sat Mar 21 2026 MTZ301>314-316>318-220000- Central Montana- National Weather Service Great Falls MT 338 AM MDT Sat Mar 21 2026 .TODAY...Mostly cloudy. Chance of rain through the day. Slight chance of snow in the afternoon. Highs 50 to 60...40 to 50 in the mountains. Northwest winds 20 to 25 mph with gusts to 35 mph in the afternoon. .TONIGHT...Partly cloudy. Slight chance of rain and snow. Lows 25 to 30. .SUNDAY...Sunny then becoming partly cloudy. Highs 50 to 55... 40 to 50 in the mountains. West winds 20 to 25 mph with gusts to 40 mph in the afternoon. .MONDAY...Mostly cloudy. Lows 25 to 30. Highs 50 to 60. .TUESDAY...Mostly cloudy. Slight chance of rain and snow. Lows 30 to 35. Highs 45 to 55. .WEDNESDAY...Mostly cloudy. Chance of rain and snow. Lows 35 to 40. Highs 50 to 60. $$ MTZ315-319>330-220000- Southwest Montana- National Weather Service Great Falls MT 338 AM MDT Sat Mar 21 2026 .TODAY...Increasing clouds. Slight chance of rain in the morning. Chance of rain in the afternoon. Highs 60 to 70...50 to 60 in the mountains. West winds 20 to 30 mph with gusts to 50 mph in the afternoon. .TONIGHT...Mostly clear. Slight chance of rain and snow. Lows 25 to 30. Gusts up to 40 mph in the evening. .SUNDAY...Sunny then becoming partly cloudy. Highs 50 to 60... 40 to 50 in the mountains. Gusts up to 35 mph in the afternoon. .MONDAY...Mostly cloudy. Lows 25 to 35. Highs 50 to 60. .TUESDAY...Mostly cloudy. Chance of rain and snow. Lows 35 to 40. Highs 50 to 60. .WEDNESDAY...Mostly cloudy. Chance of rain and snow. Lows 35 to 45. Highs 50 to 60. $$