FPUS65 KTFX 040339 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 938 PM MDT Sun May 3 2026 MTZ301>314-316>318-041200- Central Montana- National Weather Service Great Falls MT 938 PM MDT Sun May 3 2026 .REST OF TONIGHT...Mostly cloudy. Slight chance of rain after midnight. Lows 35 to 45...30 to 40 in the mountains. .MONDAY...Mostly cloudy. Slight chance of rain through the day. Highs 50 to 60...40 to 50 in the mountains. Northwest winds 20 to 25 mph with gusts to 35 mph in the afternoon. .MONDAY NIGHT...Increasing clouds. Colder. Lows 30 to 35...25 to 30 in the mountains. .TUESDAY...Partly cloudy. Slight chance of snow. Highs 45 to 55. .WEDNESDAY...Mostly clear. Lows 25 to 30. Highs 60 to 70. .THURSDAY...Mostly cloudy. Chance of rain. Lows 40 to 45. Highs 60 to 70. .FRIDAY...Mostly cloudy. Slight chance of rain. Lows 40 to 45. Highs 65 to 75. $$ MTZ315-319>330-041200- Southwest Montana- National Weather Service Great Falls MT 938 PM MDT Sun May 3 2026 .REST OF TONIGHT...Mostly clear. Lows 35 to 40...30 to 35 in the mountains. .MONDAY...Partly cloudy. Highs 50 to 60...45 to 55 in the mountains. .MONDAY NIGHT...Partly cloudy. Lows 30 to 35...25 to 30 in the mountains. .TUESDAY...Partly cloudy. Slight chance of snow. Highs 45 to 55. .WEDNESDAY...Mostly clear. Lows 25 to 30. Highs 55 to 65. .THURSDAY...Mostly cloudy. Chance of rain. Lows 35 to 45. Highs 60 to 70. .FRIDAY...Mostly cloudy. Lows 35 to 40. Highs 60 to 70. $$