FPUS65 KTFX 211730 SFPMT State Forecast For Montana National Weather Service Great Falls MT 1130 AM MDT Tue Apr 21 2026 MTZ001>007-043-212200- West of the Continental Divide- National Weather Service Missoula MT 1130 AM MDT Tue Apr 21 2026 .TODAY...Partly cloudy. Highs in the upper 70s to mid 80s. .TONIGHT...Partly cloudy. Lows in the 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely in the afternoon and evening. Highs in the upper 50s to mid 60s. .THURSDAY...Rain and snow showers likely. Lows in the 30s. Highs in the 40s to lower 50s. .FRIDAY...Mostly cloudy with a chance of snow. Lows in the 20s. Highs in the 40s. .SATURDAY...Mostly cloudy. Lows 19 to 26. Highs in the mid 40s to lower 50s. $$ MTZ301>314-316>318-212200- Central Montana- National Weather Service Great Falls MT 1130 AM MDT Tue Apr 21 2026 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON FOR Judith Basin County and Judith Gap...Fergus County below 4500ft...Snowy and Judith Mountains... ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY AFTERNOON FOR Little Belt and Highwood Mountains... .REST OF TODAY...Sunny. Highs 75 to 80...65 to 75 in the mountains. .TONIGHT...Mostly cloudy. Lows 45 to 55...40 to 50 in the mountains. .WEDNESDAY...Increasing clouds. Slight chance of thunderstorms in the afternoon. Highs 65 to 75...55 to 65 in the mountains. West winds 20 to 30 mph with gusts to 40 mph in the afternoon and evening. .THURSDAY...Much colder. Rain and chance of snow. Lows 25 to 35. Highs 35 to 45. .FRIDAY...Mostly cloudy. Chance of snow. Lows 20 to 25. Highs 30 to 40. .SATURDAY...Mostly cloudy. Chance of snow. Lows 20 to 25. Highs 35 to 40. $$ MTZ315-319>330-212200- Southwest Montana- National Weather Service Great Falls MT 1130 AM MDT Tue Apr 21 2026 ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY AFTERNOON FOR Big Belt, Bridger and Castle Mountains...Gallatin and Madison County Mountains and Centennial Mountains... .REST OF TODAY...Sunny late in the morning then becoming mostly cloudy. Highs 70 to 80...60 to 70 in the mountains. Gusts up to 35 mph in the afternoon. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 35 to 50. .WEDNESDAY...Increasing clouds. Cooler. Snow and rain through the day. Slight chance of thunderstorms in the afternoon. Highs 50 to 60...40 to 50 in the mountains. Southwest winds 20 to 30 mph. Gusts up to 50 mph decreasing to 40 mph in the evening. .THURSDAY...Snow. Lows 25 to 35. Highs 35 to 45. .FRIDAY...Snow likely. Lows 20 to 25. Highs 25 to 35. .SATURDAY...Mostly cloudy. Slight chance of snow. Lows 15 to 20. Highs 30 to 40. $$ MTZ016>027-059>062-212200- Northeast Montana- National Weather Service Glasgow MT 1130 AM MDT Tue Apr 21 2026 .REST OF TODAY...Sunny. Highs in the lower to mid 80s. .TONIGHT...Mostly cloudy. Lows in the lower to mid 50s. .WEDNESDAY...Mostly cloudy. A slight chance of showers in the morning, then a chance of showers and a slight chance of thunderstorms in the afternoon and evening. Highs in the lower to mid 80s. .THURSDAY...Rain showers and a chance of snow showers. Highs in the 40s. Lows in the mid 30s to lower 40s. .FRIDAY...Mostly cloudy with a chance of snow showers. Highs in the mid to upper 30s. Lows in the mid to upper 20s. .SATURDAY...Mostly cloudy with a chance of snow showers. Highs in the mid 30s to lower 40s. Lows in the lower to mid 20s. $$ MTZ028>042-056>058-063>068-212200- South Central and Southeast Montana- National Weather Service Billings MT 1130 AM MDT Tue Apr 21 2026 .REST OF TODAY...Sunny. Highs in the 80s. .TONIGHT...Mostly cloudy. Lows in the upper 40s to mid 50s. .WEDNESDAY...Partly sunny. Chance of rain showers. Highs from the upper 60s west to the mid 80s east. .WEDNESDAY NIGHT...Mostly cloudy. Showers and snow showers west... and chance of showers and slight chance of thunderstorms east. Lows in the lower 30s to the lower 40s. .THURSDAY...Snow showers with showers likely west...and showers and slight chance of snow showers east. Highs in the lower 40s to the lower 50s. .THURSDAY NIGHT...Mostly cloudy. Chance of snow showers and rain showers. Lows in the lower 20s to the lower 30s. .FRIDAY...Partly sunny. Chance of snow showers. Highs in the upper 30s to the upper 40s. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Slight chance of snow showers. Lows in the upper teens to the upper 20s. Highs in the mid to upper 40s. $$