Sun Lake, MT Weather Forecast
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Sun Lake Weather Forecast
| REST OF TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
| Chance of Rain | Snow and Rain | Mostly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Cloudy | Mostly Cloudy | Snow and Rain | Chance of Snow | Chance of Snow | Chance of Snow |
| Lo: 45°FLo: 7°C | Hi: 47°FHi: 8°C | Lo: 21°FLo: -6°C | Hi: 41°FHi: 5°C | Lo: 25°FLo: -4°C | Hi: 39°FHi: 4°C | Hi: 43°FHi: 6°C Lo: 25°FLo: -4°C | Hi: 43°FHi: 6°C Lo: 25°FLo: -4°C | Lo: 29°FLo: -2°C | Hi: 41°FHi: 5°C Lo: 25°FLo: -4°C | Hi: 41°FHi: 5°C Lo: 25°FLo: -4°C | Hi: 38°FHi: 3°C |
| POP: 20% | POP: 100% | POP: 20% | POP: 50% | POP: 50% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1037 PM MDT Thu Oct 22 2026 

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Issued: 527 PM MDT Thu Oct 22 2026
Key Messages
- Significant shift to cooler and wetter conditions will occur on Friday.
- Rain develops tonight west of I-15 with rain and mountian snow early Friday and a transition to lower elevation snow by Friday evening before precipitation ends.
- Gusty to locally strong northwest winds develop across north-central Montana on Friday with much cooler temperatures spreading across the area by Friday afternoon.
- Drier but continued cooler than average conditions are expected for the weekend into early...
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