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Lake Osakis Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  | |  | |  |  | | | |
| Partly Cloudy | Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Mostly Cloudy | Clearing | Mostly Sunny | Mostly Clear | Mostly Sunny | Chance of Rain | Chance of Rain |
| Lo: 36°FLo: 2°C | Hi: 66°FHi: 19°C | Lo: 36°FLo: 2°C | Hi: 50°FHi: 10°C | Lo: 26°FLo: -3°C | Hi: 46°FHi: 8°C | Lo: 25°FLo: -4°C | Hi: 50°FHi: 10°C | Lo: 26°FLo: -3°C | Hi: 56°FHi: 13°C | Lo: 30°FLo: -1°C | Hi: 55°FHi: 13°C |
| POP: 20% | POP: 50% | POP: 80% | POP: 20% | POP: 30% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1223 PM MDT Thu Oct 08 2026 
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Issued: 145 PM MDT Thu Oct 8 2026
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KEY MESSAGES:- Gusty west winds Friday afternoon will create near-critical fire weather conditions across southwest Montana, choppy conditions at area lakes, and hazardous crosswinds for high- profile vehicles on I-90 from Deer Lodge to Butte, and I-15 south of Butte.
- Strong northeast winds will develop Saturday, causing choppy waves that could pose a danger to docks and boats on the southwestern portion of Flathead Lake. Isolated power outages are possible across northwest Montana t...