Expires:202512212300;;979919 FPUS55 KTFX 211719 ZFPTFX Zone Forecast Product for Central and Southwest Montana National Weather Service Great Falls MT 1019 AM MST Sun Dec 21 2025 Spot temperatures and probabilities of measurable precipitation are for the rest of today, tonight, and Monday. MTZ312-212300- Cascade County below 5000ft- Including the city of Great Falls 1019 AM MST Sun Dec 21 2025 .REST OF TODAY...Mostly cloudy. A 20 percent chance of rain and snow in the afternoon. Highs in the lower 40s. South winds 5 to 10 mph. .TONIGHT...Mostly cloudy. Slight chance of rain, light freezing rain and snow in the evening, then chance of rain and slight chance of light freezing rain after midnight. Lows in the lower 30s. South winds up to 10 mph. Chance of precipitation 40 percent. .MONDAY...Partly sunny with a 20 percent chance of rain, light freezing rain and snow in the morning, then sunny in the afternoon. Highs in the mid 40s. Southwest winds 10 to 20 mph. .MONDAY NIGHT...Mostly cloudy. Lows 23 to 29. South winds 5 to 10 mph. .TUESDAY...Partly sunny. Highs in the upper 40s. South winds up to 10 mph. .TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. Lows 25 to 31. Highs 36 to 42. .WEDNESDAY NIGHT...Colder. Mostly cloudy. Chance of snow and rain in the evening, then slight chance of snow after midnight. Lows 14 to 20. Chance of precipitation 40 percent. .CHRISTMAS DAY...Mostly sunny. Highs 29 to 35. .THURSDAY NIGHT AND FRIDAY...Not as cool. Mostly cloudy with a 20 percent chance of snow. Lows 18 to 24. Highs in the mid 40s. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows in the mid 20s. Highs in the lower 40s. && TEMPERATURE / PRECIPITATION Great Falls Arpt 41 31 45 / 20 30 20 $$