FPUS65 KTFX 280938 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 337 AM MDT Thu May 28 2026 MTZ301>314-316>318-290000- Central Montana- National Weather Service Great Falls MT 337 AM MDT Thu May 28 2026 .TODAY...Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Highs 85 to 95...75 to 85 in the mountains. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Slight chance of showers and thunderstorms. Lows 55 to 60. .FRIDAY...Increasing clouds. Chance of rain showers and slight chance of thunderstorms in the afternoon and evening. Highs 85 to 95...70 to 80 in the mountains. .SATURDAY...Not as warm. Rain showers and slight chance of thunderstorms. Lows 50 to 60. Highs 65 to 75. .SUNDAY...Cooler. Rain showers and slight chance of thunderstorms. Lows 40 to 50. Highs 50 to 60. .MONDAY...Mostly cloudy. Chance of rain. Lows 40 to 45. Highs 55 to 65. $$ MTZ315-319>330-290000- Southwest Montana- National Weather Service Great Falls MT 337 AM MDT Thu May 28 2026 .TODAY...Sunny. Slight chance of showers and thunderstorms in the afternoon. Highs 80 to 90...70 to 80 in the mountains. .TONIGHT...Partly cloudy. Slight chance of rain showers. Lows 45 to 55. .FRIDAY...Increasing clouds. Chance of rain showers and slight chance of thunderstorms in the afternoon and evening. Highs 75 to 85...65 to 75 in the mountains. .SATURDAY...Cooler. Rain showers and chance of thunderstorms. Lows 40 to 50. Highs 50 to 60. .SUNDAY...Rain showers likely and slight chance of thunderstorms. Lows 35 to 40. Highs 45 to 55. .MONDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 35 to 40. Highs 55 to 65. $$