FPUS65 KTFX 211424 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 823 AM MDT Sat Mar 21 2026 MTZ301>314-316>318-220000- Central Montana- National Weather Service Great Falls MT 823 AM MDT Sat Mar 21 2026 .REST OF TODAY...Mostly cloudy. Chance of snow early in the morning. Chance of rain through the day. Slight chance of snow in the afternoon. Highs 45 to 55...40 to 50 in the mountains. .TONIGHT...Partly cloudy. 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. $$ MTZ315-319>330-220000- Southwest Montana- National Weather Service Great Falls MT 823 AM MDT Sat Mar 21 2026 .REST OF TODAY...Mostly cloudy. Slight chance of rain in the afternoon. Highs 60 to 70...50 to 60 in the mountains. West winds 20 to 30 mph in the afternoon. Gusts up to 45 mph. .TONIGHT...Mostly clear. Lows 25 to 30. Northwest winds around 20 mph with gusts to 40 mph in the evening. .SUNDAY...Sunny then becoming partly cloudy. Highs 50 to 60... 40 to 50 in the mountains. Gusts up to 35 mph in the afternoon. .MONDAY...Mostly cloudy. Lows 25 to 35. Highs 50 to 60. .TUESDAY...Mostly cloudy. Chance of rain and snow. Lows 35 to 40. Highs 50 to 60. .WEDNESDAY...Mostly cloudy. Chance of rain and snow. Lows 35 to 45. Highs 50 to 60. $$