838 FPUS65 KTFX 172230 SFPMT State Forecast For Montana National Weather Service Great Falls MT 430 PM MDT Wed Jun 17 2026 MTZ001>007-043-181000- West of the Continental Divide- National Weather Service Missoula MT 430 PM MDT Wed Jun 17 2026 .../NOTICE/ The Area Forecast Product (AFP) and State Forecast Product (SFP) for Montana will be discontinued June 29, 2026... .TONIGHT...Mostly clear with areas of rain. Lows in the 40s. .THURSDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .THURSDAY NIGHT...Partly cloudy. Lows in the 40s. .JUNETEENTH...Partly cloudy. Highs in the 80s. .SATURDAY...Partly cloudy. Lows in the upper 40s to mid 50s. Highs in the mid 70s to lower 80s. .SUNDAY...Mostly clear. Lows in the 40s to lower 50s. Highs in the mid 70s to lower 80s. .MONDAY...Mostly clear. Lows in the 40s. Highs in the mid 70s to lower 80s. $$ MTZ301>314-316>318-181000- Central Montana- National Weather Service Great Falls MT 430 PM MDT Wed Jun 17 2026 .TONIGHT...Partly cloudy. Slight chance of showers and thunderstorms in the evening. Chance of rain showers after midnight. Lows 40 to 45. .THURSDAY...Increasing clouds. Chance of rain showers through the day. Slight chance of thunderstorms in the afternoon. Highs 65 to 70...55 to 65 in the mountains. .THURSDAY NIGHT...Partly cloudy. Lows 40 to 45. .JUNETEENTH...Partly cloudy. Highs 65 to 75. .SATURDAY...Partly cloudy. Chance of showers and thunderstorms. Lows 45 to 50. Highs 75 to 85. .SUNDAY...Partly cloudy. Cooler. Slight chance of rain showers. Lows 45 to 50. Highs 60 to 70. .MONDAY...Partly cloudy. Slight chance of rain showers. Lows 40 to 45. Highs 65 to 70. $$ MTZ315-319>330-181000- Southwest Montana- National Weather Service Great Falls MT 430 PM MDT Wed Jun 17 2026 .TONIGHT...Mostly clear. Lows 35 to 45. .THURSDAY...Sunny. Highs 70 to 80...60 to 70 in the mountains. .THURSDAY NIGHT...Increasing clouds. Lows 40 to 45. .JUNETEENTH...Partly cloudy. Highs 70 to 80. .SATURDAY...Mostly cloudy. Chance of showers and thunderstorms. Lows 45 to 55. Highs 65 to 75. .SUNDAY...Partly cloudy. Slight chance of rain showers. Lows 40 to 45. Highs 65 to 75. .MONDAY...Mostly clear. Lows 40 to 45. Highs 65 to 75. $$ MTZ016>027-059>062-181000- Northeast Montana- National Weather Service Glasgow MT 430 PM MDT Wed Jun 17 2026 .TONIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the 40s. .THURSDAY...Mostly cloudy. A chance of showers and thunderstorms in the afternoon. Highs near 70. .THURSDAY NIGHT...Partly cloudy. A chance of rain showers and a slight chance of thunderstorms in the evening. Lows in the 40s. .JUNETEENTH...Mostly clear. Highs near 70. .SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid to upper 70s. Lows in the mid 40s to lower 50s. .SUNDAY...Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Highs near 70. Lows in the lower to mid 50s. .MONDAY...Partly cloudy with a slight chance of rain showers. Highs in the mid 60s to lower 70s. Lows in the mid to upper 40s. $$ MTZ028>042-056>058-063>068-181000- South Central and Southeast Montana- National Weather Service Billings MT 430 PM MDT Wed Jun 17 2026 .TONIGHT...Partly cloudy. Lows in the lower 40s to the lower 50s. .THURSDAY...Mostly sunny. Slight chance of thunderstorms. Highs in the 70s. .THURSDAY NIGHT...Mostly cloudy. Lows in the lower 40s to the lower 50s. .JUNETEENTH...Mostly sunny. Highs in the mid 70s to around 80. .FRIDAY NIGHT...Mostly cloudy. Lows in the upper 40s to the upper 50s. .SATURDAY THROUGH SUNDAY...Mostly cloudy. Chance of thunderstorms. Lows in the upper 40s to the upper 50s. Highs in the lower 70s to the lower 80s. .SUNDAY NIGHT AND MONDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows in the mid 40s to the mid 50s. Highs in the mid 60s to the mid 70s. $$