FPUS65 KTFX 190803 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 202 AM MDT Mon May 19 2025 MTZ301>314-316>318-200000- Central Montana- National Weather Service Great Falls MT 202 AM MDT Mon May 19 2025 .TODAY...Mostly cloudy. Patchy dense fog in the morning. Chance of rain showers through the day. Highs 50 to 60...40 to 50 in the mountains. .TONIGHT...Mostly cloudy. Chance of rain showers through the night. Lows 35 to 40...30 to 35 in the mountains. .TUESDAY...Increasing clouds in the afternoon then becoming partly cloudy. Chance of rain showers through the day. Highs 55 to 65...45 to 55 in the mountains. West winds 20 to 25 mph with gusts to 35 mph in the afternoon. .WEDNESDAY...Partly cloudy. Slight chance of rain showers. Lows 35 to 40. Highs 55 to 65. .THURSDAY...Mostly cloudy. Chance of rain showers. Lows 35 to 40. Highs 55 to 65. .FRIDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 40 to 45. Highs 60 to 65. $$ MTZ315-319>330-200000- Southwest Montana- National Weather Service Great Falls MT 202 AM MDT Mon May 19 2025 .TODAY...Sunny. Highs 50 to 60...40 to 50 in the mountains. .TONIGHT...Partly cloudy. Lows 25 to 35. .TUESDAY...Mostly cloudy then becoming partly cloudy. Rain and snow showers likely through the day. Slight chance of thunderstorms in the afternoon and evening. Highs 50 to 60... 40 to 50 in the mountains. .WEDNESDAY...Partly cloudy. Lows 25 to 35. Highs 50 to 60. .THURSDAY...Mostly cloudy. Chance of rain showers, snow showers and slight chance of thunderstorms. Lows 35 to 40. Highs 50 to 60. .FRIDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 30 to 40. Highs 55 to 65. $$