FPUS65 KTFX 190934 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 333 AM MDT Sun Apr 19 2026 MTZ301>314-316>318-200000- Central Montana- National Weather Service Great Falls MT 333 AM MDT Sun Apr 19 2026 .TODAY...Sunny. Highs 60 to 70...50 to 60 in the mountains. .TONIGHT...Partly cloudy. Lows 35 to 45. .MONDAY...Partly cloudy then becoming sunny in the afternoon then becoming partly cloudy. Highs 70 to 75...60 to 70 in the mountains. .TUESDAY...Partly cloudy. Lows 40 to 45. Highs 70 to 80. .WEDNESDAY...Rain and slight chance of thunderstorms. Lows 45 to 50. Highs 65 to 75. .THURSDAY...Much colder. Rain and chance of snow. Lows 30 to 35. Highs 40 to 45. $$ MTZ315-319>330-200000- Southwest Montana- National Weather Service Great Falls MT 333 AM MDT Sun Apr 19 2026 .TODAY...Sunny. Highs 55 to 65...50 to 60 in the mountains. .TONIGHT...Increasing clouds. Lows 30 to 40. .MONDAY...Sunny then becoming partly cloudy. Highs 65 to 75... 55 to 65 in the mountains. .TUESDAY...Partly cloudy. Lows 35 to 45. Highs 65 to 75. .WEDNESDAY...Rain showers, snow and slight chance of thunderstorms. Lows 40 to 45. Highs 55 to 65. .THURSDAY...Colder. Chance of snow and rain. Lows 30 to 35. Highs 35 to 45. $$