FPUS65 KTFX 130634 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 1234 AM MDT Sat Jun 13 2026 MTZ301>314-316>318-141200- Central Montana- National Weather Service Great Falls MT 1234 AM MDT Sat Jun 13 2026 .REST OF TONIGHT...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms after midnight. Slight chance of rain showers. Slight chance of thunderstorms in the afternoon. Highs 55 to 65...45 to 55 in the mountains. Lows 35 to 45...30 to 40 in the mountains. .SUNDAY...Partly cloudy. Highs 65 to 70...55 to 65 in the mountains. .SUNDAY NIGHT...Partly cloudy. Lows 45 to 50...40 to 45 in the mountains. .MONDAY...Partly cloudy. Highs 70 to 80. .TUESDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 50 to 55. Highs 75 to 85. .WEDNESDAY...Mostly cloudy. Cooler. Chance of rain showers and slight chance of thunderstorms. Lows 45 to 50. Highs 60 to 70. .THURSDAY...Partly cloudy. Slight chance of rain showers. Lows in the mid 40s. Highs 65 to 75. $$ MTZ315-319>330-141200- Southwest Montana- National Weather Service Great Falls MT 1234 AM MDT Sat Jun 13 2026 .REST OF TONIGHT...Partly cloudy. Chance of rain showers and slight chance of thunderstorms after midnight. Slight chance of rain showers. Slight chance of thunderstorms in the afternoon. Highs 55 to 65...50 to 60 in the mountains. Lows 35 to 45...30 to 40 in the mountains. .SUNDAY...Partly cloudy. Highs 65 to 70...55 to 65 in the mountains. .SUNDAY NIGHT...Mostly clear. Lows 35 to 45. .MONDAY...Partly cloudy. Highs 65 to 75. .TUESDAY...Partly cloudy. Lows 45 to 50. Highs 70 to 80. .WEDNESDAY...Clear. Lows 45 to 50. Highs 65 to 75. .THURSDAY...Mostly clear. Lows 40 to 45. Highs 70 to 80. $$