Weather WorldLamarche Lake, MT Weather Forecast
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Lamarche Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  |  | |  |  | | | | | |
| Patchy Fog | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Partly Cloudy | Rain and Snow | Snow | Rain and Snow | Rain and Snow | Chance of Snow | Chance of Snow | Chance of Snow |
| Hi: 45°FHi: 7°C | Lo: 23°FLo: -5°C | Hi: 45°FHi: 7°C | Lo: 25°FLo: -4°C | Hi: 46°FHi: 8°C | Lo: 26°FLo: -3°C | Hi: 40°FHi: 4°C | Lo: 23°FLo: -5°C | Hi: 40°FHi: 4°C | Lo: 22°FLo: -6°C | Hi: 40°FHi: 4°C | Lo: 23°FLo: -5°C |
| POP: 60% | POP: 60% | POP: 40% | POP: 30% | POP: 20% | POP: 20% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1228 AM MDT Sat Oct 24 2026 
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Issued: 1221 PM MDT Fri Oct 23 2026
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KEY MESSAGES:- October weather has arrived! Seasonal temperatures mean cool afternoons and cooler mornings.
- Confidence is increasing for potential winter driving conditions at mountain pass level Tuesday night into Wednesday.
Precipitation will continue this afternoon ending from northwest to southeast late afternoon into early evening. Observations from around the region also demonstrate snow levels are slowly lowering. Precipitation may linger in southwest MT as snow levels lower to...