Expires:202506021000;;544095 FPUS65 KTFX 012330 SFPMT State Forecast For Montana National Weather Service Great Falls MT 530 PM MDT Sun Jun 1 2025 MTZ315-319>330-021000- Southwest Montana- National Weather Service Great Falls MT 530 PM MDT Sun Jun 1 2025 .TONIGHT...Mostly cloudy. Chance of thunderstorms in the evening. Chance of rain showers through the night. Slight chance of thunderstorms after midnight. Lows 40 to 45...35 to 40 in the mountains. .MONDAY...Mostly cloudy. Chance of rain showers through the day. Slight chance of thunderstorms in the afternoon. Highs 55 to 60... 45 to 55 in the mountains. .MONDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 35 to 40...30 to 35 in the mountains. .TUESDAY...Mostly cloudy. Slight chance of rain showers. Highs 50 to 60. .WEDNESDAY...Partly cloudy. Lows 35 to 40. Highs 55 to 65. .THURSDAY...Mostly cloudy. Slight chance of showers and thunderstorms. Lows 40 to 45. Highs 60 to 70. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 40 to 45. Highs 65 to 75. $$