FPUS65 KTFX 220805 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 205 AM MDT Thu May 22 2025 MTZ301>314-316>318-230015- Central Montana- National Weather Service Great Falls MT 205 AM MDT Thu May 22 2025 .TODAY...Mostly cloudy. Slight chance of rain showers in the afternoon. Highs 60 to 70...50 to 60 in the mountains. .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. .FRIDAY...Mostly cloudy. Rain showers likely through the day. Slight chance of thunderstorms in the afternoon and evening. Highs 55 to 65...45 to 55 in the mountains. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 35 to 40. Highs 60 to 70. .SUNDAY...Mostly clear. Lows 40 to 45. Highs 65 to 75. .MEMORIAL DAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs 70 to 80. $$ MTZ315-319>330-230015- Southwest Montana- National Weather Service Great Falls MT 205 AM MDT Thu May 22 2025 .TODAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 55 to 65...50 to 60 in the mountains. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Chance of showers and thunderstorms. Lows 30 to 40. .FRIDAY...Increasing clouds. Chance of rain showers and slight chance of thunderstorms in the afternoon and evening. Highs 60 to 65...50 to 60 in the mountains. .SATURDAY...Partly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 35 to 40. Highs 55 to 65. .SUNDAY...Mostly clear. Lows 35 to 40. Highs 60 to 70. .MEMORIAL DAY...Mostly clear. Chance of rain showers and slight chance of thunderstorms. Lows 40 to 45. Highs 65 to 75. $$