Square Lake, MT Weather Forecast
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Square Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
| Partly Cloudy | Chance of Rain | Chance of Rain | Chance of Snow | Chance of Snow | Chance of Snow | Chance of Snow | Mostly Clear | Mostly Sunny | Chance of Rain | Chance of Rain | Chance of Rain |
| Hi: 66°FHi: 19°C | Lo: 36°FLo: 2°C | Hi: 50°FHi: 10°C | Lo: 30°FLo: -1°C | Hi: 40°FHi: 4°C | Lo: 26°FLo: -3°C | Hi: 50°FHi: 10°C | Lo: 26°FLo: -3°C | Hi: 55°FHi: 13°C | Lo: 35°FLo: 2°C | Hi: 55°FHi: 13°C | Lo: 35°FLo: 2°C |
| POP: 50% | POP: 50% | POP: 100% | POP: 50% | POP: 30% | POP: 20% | POP: 20% | POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 327 AM MDT Fri Oct 09 2026 

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Issued: 349 AM MDT Fri Oct 9 2026
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KEY MESSAGES:- Gusty west winds Friday 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 throug...
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