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Flathead Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY |
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| Rain | Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Chance of T-Storm | Chance of Rain | Chance of Rain | Chance of T-Storm | Chance of Rain | Chance of Rain |
| Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 66°FHi: 19°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C |
| POP: 50% | POP: 60% | POP: 70% | POP: 50% | POP: 50% | POP: 50% | POP: 30% | POP: 30% | POP: 50% | POP: 60% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1223 PM MDT Wed Sep 02 2026 
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Issued: 1011 AM MDT Wed Sep 2 2026
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KEY MESSAGES:- Widespread showers and thunderstorms today with outflow gusts of 25-45 mph and heavy rain rates up to 0.5 inch per hour
An upper level disturbance and associated cold front tracking across the Northern Rockies has already initiated showers and thunderstorms over north-central Idaho this morning, and will progress northeastward across the Continental Divide by mid- afternoon (3-4pm MDT). Primary hazards include brief heavy rainfall and erratic outflow gusts of 30-50 mph,...