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Sidney Lake, MT Weather Forecast
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Sidney Lake Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  | | | |  |  |  | | |
| Partly Cloudy | Rain and Snow | Blowing Snow | Snow | Snow | Rain and Snow | Partly Cloudy | Partly Cloudy | Mostly Clear | Chance of Rain | Chance of Snow | Partly Cloudy |
| Lo: 35°FLo: 2°C | Hi: 46°FHi: 8°C | Lo: 23°FLo: -5°C | Hi: 35°FHi: 2°C | Lo: 21°FLo: -6°C | Hi: 40°FHi: 4°C | Lo: 23°FLo: -5°C | Hi: 46°FHi: 8°C | Lo: 26°FLo: -3°C | Hi: 50°FHi: 10°C | Lo: 26°FLo: -3°C | Hi: 50°FHi: 10°C |
| POP: 90% | POP: 100% | POP: 100% | POP: 100% | POP: 50% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1223 PM MDT Fri Oct 09 2026 
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Issued: 1231 PM MDT Fri Oct 9 2026
Discussion
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KEY MESSAGES:- Gusty west winds this afternoon will create 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 through S...