FPUS65 KTFX 210330 SFPMT State Forecast For Montana National Weather Service Great Falls MT 930 PM MDT Sat Jun 20 2026 MTZ001>007-043-211000- West of the Continental Divide- National Weather Service Missoula MT 930 PM MDT Sat Jun 20 2026 .../NOTICE/ The Area Forecast Product (AFP) and State Forecast Product (SFP) for Montana will be discontinued June 29, 2026... .TONIGHT...Mostly clear. Lows in the 40s to lower 50s. .SUNDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MONDAY...Mostly clear. Highs in the 70s. .TUESDAY...Mostly clear. Lows in the upper 30s to mid 40s. Highs in the upper 70s to mid 80s. .WEDNESDAY...Partly cloudy. Lows in the 40s to lower 50s. Highs in the mid 80s to lower 90s. .THURSDAY...Partly cloudy. Lows in the mid 40s to lower 50s. Highs in the mid 80s to lower 90s. $$ MTZ301>314-316>318-211000- Central Montana- National Weather Service Great Falls MT 930 PM MDT Sat Jun 20 2026 .REST OF TONIGHT...Mostly cloudy late in the evening then becoming partly cloudy. Chance of rain showers and slight chance of thunderstorms late in the evening. Slight chance of rain showers after midnight. Lows 45 to 55...40 to 50 in the mountains. .SUNDAY...Sunny. Slight chance of thunderstorms in the afternoon. Highs 65 to 75...55 to 65 in the mountains. .SUNDAY NIGHT...Increasing clouds. Slight chance of rain showers through the night. Lows 45 to 50...40 to 45 in the mountains. .MONDAY...Partly cloudy. Chance of rain showers. Highs 60 to 65. .TUESDAY...Mostly clear. Lows 40 to 45. Highs 65 to 75. .WEDNESDAY...Partly cloudy. Lows 45 to 50. Highs 70 to 80. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 50 to 55. Highs 75 to 85. $$ MTZ315-319>330-211000- Southwest Montana- National Weather Service Great Falls MT 930 PM MDT Sat Jun 20 2026 .REST OF TONIGHT...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms late in the evening. Lows 40 to 50. .SUNDAY...Sunny. Highs 70 to 80...60 to 70 in the mountains. .SUNDAY NIGHT...Partly cloudy. Lows 40 to 45. .MONDAY...Mostly clear. Slight chance of rain showers. Highs 60 to 70. .TUESDAY...Mostly clear. Lows 35 to 40. Highs 70 to 80. .WEDNESDAY...Partly cloudy. Lows 40 to 45. Highs 70 to 80. .THURSDAY...Partly cloudy. Lows 45 to 50. Highs 75 to 85. $$ MTZ016>027-059>062-211000- Northeast Montana- National Weather Service Glasgow MT 930 PM MDT Sat Jun 20 2026 .TONIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and a slight chance of thunderstorms after midnight. Lows in the lower to mid 50s. .SUNDAY...Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Highs in the upper 60s to mid 70s. .SUNDAY NIGHT...Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows near 50. .MONDAY...Mostly cloudy. A chance of showers in the morning, then a chance of showers and a slight chance of thunderstorms in the afternoon and evening. Highs in the mid to upper 60s. .TUESDAY...Partly cloudy with a slight chance of rain showers. Highs in the mid 60s to lower 70s. Lows in the mid to upper 40s. .WEDNESDAY...Partly cloudy. Highs in the lower to mid 70s. Lows in the 40s. .THURSDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs near 80. Lows near 50. $$ MTZ028>042-056>058-063>068-211000- South Central and Southeast Montana- National Weather Service Billings MT 930 PM MDT Sat Jun 20 2026 .TONIGHT...Cloudy. Scattered thunderstorms. Lows in the upper 40s to the upper 50s. .SUNDAY...Partly sunny. Chance of showers and isolated thunderstorms west...and patchy fog east...and chance of showers and isolated thunderstorms east. Highs in the upper 60s to around 80. .SUNDAY NIGHT...Mostly cloudy. Chance of rain showers and isolated thunderstorms. Lows in the mid 40s to the mid 50s. .MONDAY...Rain showers and scattered thunderstorms. Highs in the mid 60s to the mid 70s. .MONDAY NIGHT...Partly cloudy. Slight chance of rain showers and isolated thunderstorms. Lows in the lower 40s to the lower 50s. .TUESDAY AND TUESDAY NIGHT...Mostly clear. Lows in the lower 40s to the lower 50s. Highs in the upper 60s to the upper 70s. .WEDNESDAY AND WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s to the mid 50s. Highs in the lower 70s to the lower 80s. .THURSDAY...Mostly sunny. Slight chance of thunderstorms. Highs in the upper 70s to the upper 80s. $$