FPUS65 KTFX 062138 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 337 PM MDT Wed May 6 2026 MTZ301>314-316>318-071200- Central Montana- National Weather Service Great Falls MT 337 PM MDT Wed May 6 2026 .TONIGHT...Mostly cloudy. Slight chance of rain showers in the evening. Chance of rain showers after midnight. Lows 40 to 50... 35 to 45 in the mountains. .THURSDAY...Mostly cloudy. Chance of rain showers through the day. Slight chance of thunderstorms in the afternoon. Highs 60 to 70...50 to 60 in the mountains. .THURSDAY NIGHT...Mostly cloudy. Lows 40 to 45...35 to 40 in the mountains. .FRIDAY...Mostly cloudy. Chance of rain showers. Highs 65 to 75. .SATURDAY...Mostly cloudy. Chance of rain showers. Lows 45 to 50. Highs 60 to 70. .SUNDAY...Partly cloudy. Lows 40 to 45. Highs 70 to 80. .MONDAY...Partly cloudy. Lows 45 to 50. Highs 65 to 75. $$ MTZ315-319>330-071200- Southwest Montana- National Weather Service Great Falls MT 337 PM MDT Wed May 6 2026 .TONIGHT...Mostly cloudy. Slight chance of thunderstorms in the evening. Chance of rain showers through the night. Lows 40 to 45...35 to 40 in the mountains. Gusts up to 35 mph in the evening. .THURSDAY...Partly cloudy. Chance of rain showers through the day. Slight chance of thunderstorms in the afternoon. Highs 60 to 70...50 to 60 in the mountains. .THURSDAY NIGHT...Partly cloudy. Lows 35 to 40. .FRIDAY...Mostly cloudy. Highs 60 to 70. .SATURDAY...Mostly clear. Lows 35 to 45. Highs 60 to 70. .SUNDAY...Partly cloudy. Lows 35 to 40. Highs 65 to 75. .MONDAY...Partly cloudy. Lows 40 to 45. Highs 65 to 75. $$