FPUS65 KTFX 012138 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 337 PM MDT Fri May 1 2026 MTZ301>314-316>318-021200- Central Montana- National Weather Service Great Falls MT 337 PM MDT Fri May 1 2026 .TONIGHT...Mostly clear. Lows 40 to 45. .SATURDAY...Increasing clouds. Slight chance of rain through the day. Highs 65 to 70...55 to 65 in the mountains. .SATURDAY NIGHT...Mostly cloudy. Slight chance of rain through the night. Lows 40 to 45. .SUNDAY...Partly cloudy. Highs 65 to 75. .MONDAY...Mostly cloudy. Slight chance of rain. Lows 40 to 45. Highs 55 to 60. .TUESDAY...Partly cloudy. Lows 30 to 35. Highs 50 to 60. .WEDNESDAY...Partly cloudy. Lows 30 to 35. Highs 60 to 70. $$ MTZ315-319>330-021200- Southwest Montana- National Weather Service Great Falls MT 337 PM MDT Fri May 1 2026 .TONIGHT...Clear. Lows 30 to 40. .SATURDAY...Partly cloudy. Highs 65 to 70...55 to 65 in the mountains. .SATURDAY NIGHT...Mostly cloudy. Slight chance of rain. Lows 35 to 45. .SUNDAY...Partly cloudy. Slight chance of rain. Highs 60 to 70. .MONDAY...Partly cloudy. Slight chance of rain and snow. Lows 35 to 40. Highs 55 to 65. .TUESDAY...Partly cloudy. Slight chance of snow. Lows 30 to 35. Highs 50 to 60. .WEDNESDAY...Mostly clear. Lows 30 to 35. Highs 55 to 65. $$