FPUS65 KTFX 191330 SFPMT State Forecast For Montana National Weather Service Great Falls MT 730 AM MDT Tue Aug 19 2025 MTZ001>007-043-192200- West of the Continental Divide- National Weather Service Missoula MT 730 AM MDT Tue Aug 19 2025 .TODAY...Mostly sunny. Highs in the upper 80s to mid 90s. .TONIGHT...Partly cloudy with a chance of rain showers and a slight chance of thunderstorms. Lows in the upper 40s to mid 50s. .WEDNESDAY...Mostly sunny in the morning, then mostly clear with a chance of rain showers in the afternoon and evening. Highs in the mid 80s to lower 90s. .THURSDAY...Mostly clear. Lows in the mid 40s to lower 50s. Highs in the 80s. .FRIDAY...Mostly clear. Lows in the 40s to lower 50s. Highs in the 80s to lower 90s. .SATURDAY...Mostly clear. Lows in the mid 40s to lower 50s. Highs in the upper 80s to mid 90s. $$ MTZ301>314-316>318-192200- Central Montana- National Weather Service Great Falls MT 730 AM MDT Tue Aug 19 2025 .REST OF TODAY...Sunny. Highs 90 to 95...80 to 90 in the mountains. .TONIGHT...Increasing clouds. Chance of showers and thunderstorms through the night. Lows 60 to 65...50 to 60 in the mountains. .WEDNESDAY...Sunny then becoming partly cloudy. Slight chance of thunderstorms in the evening. Highs 85 to 95...75 to 85 in the mountains. .THURSDAY...Mostly clear. Lows 50 to 60. Highs 75 to 80. .FRIDAY...Mostly clear. Lows 45 to 55. Highs 70 to 80. .SATURDAY...Mostly clear. Lows 45 to 50. Highs 75 to 80. $$ MTZ315-319>330-192200- Southwest Montana- National Weather Service Great Falls MT 730 AM MDT Tue Aug 19 2025 .REST OF TODAY...Sunny. Highs 85 to 95...75 to 85 in the mountains. .TONIGHT...Mostly clear. Lows 50 to 60...55 to 65 in the mountains. .WEDNESDAY...Sunny in the morning then becoming partly cloudy. Slight chance of rain showers in the afternoon and evening. Highs 80 to 90...75 to 85 in the mountains. .THURSDAY...Mostly clear. Lows 45 to 55. Highs 70 to 80. .FRIDAY...Mostly clear. Lows 45 to 50. Highs 75 to 85. .SATURDAY...Mostly clear. Lows 45 to 50. Highs 75 to 85. $$ MTZ016>027-059>062-192200- Northeast Montana- National Weather Service Glasgow MT 730 AM MDT Tue Aug 19 2025 ...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MDT WEDNESDAY... .TODAY...Sunny. Highs 96 to 101. .TONIGHT...Mostly clear. Lows in the mid 60s to lower 70s. .WEDNESDAY...Sunny in the morning, then mostly clear with a slight chance of showers and thunderstorms in the afternoon and evening. Highs 96 to 101. .THURSDAY...Mostly clear. A slight chance of showers and thunderstorms. Highs near 80. Lows in the lower to mid 60s. .FRIDAY...Mostly clear. Highs in the mid to upper 70s. Lows in the lower to mid 50s. .SATURDAY...Mostly clear. Highs in the mid to upper 70s. Lows near 50. $$ MTZ028>042-056>058-063>068-192200- South Central and Southeast Montana- National Weather Service Billings MT 730 AM MDT Tue Aug 19 2025 ...Heat Advisory in effect from 9 AM this morning to 9 PM MDT Wednesday for portions of South Central Montana... and all of Southeast Montana... .TODAY...Sunny. Highs 94 to 104. .TONIGHT...Mostly clear. Lows from the mid 50s west to the lower 70s east. .WEDNESDAY...Sunny. Highs 93 to 103. .WEDNESDAY NIGHT...Partly cloudy. Slight chance of thunderstorms west...and slight chance of showers east. Lows in the mid 50s to upper 60s. .THURSDAY...Sunny. Highs in the lower to mid 80s. .THURSDAY NIGHT...Partly cloudy. Chance of showers and slight chance of thunderstorms east. Lows of around 50 to around 60. .FRIDAY THROUGH SATURDAY...Mostly clear. Lows in the upper 40s to the upper 50s. Highs in the upper 70s to mid 80s. $$