FPUS65 KTFX 212230 SFPMT State Forecast For Montana National Weather Service Great Falls MT 430 PM MDT Sun Jun 21 2026 MTZ001>007-043-221000- West of the Continental Divide- National Weather Service Missoula MT 430 PM MDT Sun Jun 21 2026 .../NOTICE/ The Area Forecast Product (AFP) and State Forecast Product (SFP) for Montana will be discontinued June 29, 2026... .TONIGHT...Partly cloudy. Lows in the 40s. .MONDAY...Mostly sunny. Highs in the 70s to lower 80s. .MONDAY NIGHT...Mostly clear. Lows in the 40s. .TUESDAY...Mostly sunny in the morning then becoming partly cloudy. Highs in the upper 70s to mid 80s. .WEDNESDAY...Partly cloudy. Lows in the mid 40s to lower 50s. Highs in the 80s. .THURSDAY...Partly cloudy. Lows in the upper 40s to mid 50s. Highs in the upper 70s to mid 80s. .FRIDAY...Mostly cloudy with a chance of rain showers. Lows in the upper 40s to mid 50s. Highs in the upper 60s to mid 70s. $$ MTZ301>314-316>318-221000- Central Montana- National Weather Service Great Falls MT 430 PM MDT Sun Jun 21 2026 .TONIGHT...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 45 to 50...40 to 45 in the mountains. .MONDAY...Partly cloudy. Chance of rain showers through the day. Slight chance of thunderstorms in the afternoon. Highs 60 to 70... 50 to 60 in the mountains. .MONDAY NIGHT...Partly cloudy. Lows 40 to 45...35 to 40 in the mountains. .TUESDAY...Partly cloudy. Highs 65 to 70. .WEDNESDAY...Partly cloudy. Lows 45 to 50. Highs 70 to 75. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 50 to 55. Highs 70 to 80. .FRIDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 50 to 55. Highs 75 to 85. $$ MTZ315-319>330-221000- Southwest Montana- National Weather Service Great Falls MT 430 PM MDT Sun Jun 21 2026 .TONIGHT...Mostly cloudy in the evening then clearing. Slight chance of rain showers in the evening. Lows 40 to 50. .MONDAY...Sunny. Slight chance of thunderstorms in the afternoon. Highs 65 to 75...60 to 70 in the mountains. .MONDAY NIGHT...Mostly clear. Lows 40 to 45...35 to 40 in the mountains. .TUESDAY...Mostly clear. Highs 65 to 75. .WEDNESDAY...Partly cloudy. Lows 40 to 50. Highs 70 to 80. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 45 to 50. Highs 70 to 80. .FRIDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 45 to 55. Highs 70 to 80. $$ MTZ016>027-059>062-221000- Northeast Montana- National Weather Service Glasgow MT 430 PM MDT Sun Jun 21 2026 .TONIGHT...Mostly cloudy. A chance of showers in the evening, then a chance of showers and a slight chance of thunderstorms after midnight. Patchy fog after midnight. Lows near 50. .MONDAY...Showers likely and a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 60s to lower 70s. .MONDAY NIGHT...Partly cloudy. A chance of rain showers and a slight chance of thunderstorms in the evening. Lows in the mid to upper 40s. .TUESDAY...Partly cloudy. A chance of rain showers in the afternoon and evening. Highs in the mid 60s to lower 70s. .WEDNESDAY...Partly cloudy. Highs near 70. Lows in the mid to upper 40s. .THURSDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 70s to lower 80s. Lows near 50. .FRIDAY...Mostly cloudy with a chance of thunderstorms and a slight chance of showers. Highs near 80. Lows in the 50s. $$ MTZ028>042-056>058-063>068-221000- South Central and Southeast Montana- National Weather Service Billings MT 430 PM MDT Sun Jun 21 2026 .TONIGHT...Mostly cloudy. Patchy fog. Chance of rain showers and isolated thunderstorms. Lows in the upper 40s to the upper 50s. .MONDAY...Partly sunny. Scattered thunderstorms. Highs in the mid 60s to the mid 70s. .MONDAY NIGHT...Partly cloudy. Slight chance of showers west... and patchy fog east...and slight chance of showers and isolated thunderstorms west...and scattered thunderstorms east. Lows in the lower 40s to the lower 50s. .TUESDAY...Sunny. Highs in the upper 60s to the upper 70s. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 40s to the lower 50s. .WEDNESDAY...Mostly sunny. Slight chance of thunderstorms west... and slight chance of showers east. Highs of around 70 to around 80. .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s to the mid 50s. .THURSDAY...Mostly sunny. Slight chance of thunderstorms. Highs in the mid 70s to the mid 80s. .THURSDAY NIGHT...Mostly cloudy. Chance of thunderstorms. Lows of around 50 to around 60. .FRIDAY...Partly sunny. Slight chance of thunderstorms. Highs of around 80 to around 90. $$