Expires:202512252300;;204394 FPUS65 KTFX 251530 SFPMT State Forecast For Montana National Weather Service Great Falls MT 830 AM MST Thu Dec 25 2025 MTZ315-319>330-252300- Southwest Montana- National Weather Service Great Falls MT 830 AM MST Thu Dec 25 2025 .REST OF TODAY...Mostly cloudy early in the morning then becoming partly cloudy. Slight chance of rain and snow early in the morning. Highs 40 to 50...35 to 45 in the mountains. .TONIGHT...Mostly cloudy. Chance of snow through the night. Lows 30 to 35...25 to 30 in the mountains. .FRIDAY...Mostly cloudy then becoming partly cloudy. Chance of snow through the day. Highs 40 to 50...30 to 40 in the mountains. Southwest winds 20 to 30 mph with gusts to 45 mph in the afternoon and evening. .SATURDAY...Mostly cloudy. Colder. Chance of snow. Lows 5 to 20. Highs 20 to 30. .SUNDAY...Partly cloudy. Lows zero to 15 above. Highs 15 to 25. .MONDAY...Partly cloudy. Lows 10 to 25. Highs 25 to 35. $$