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Cup Lake, MT Weather Forecast
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Cup Lake Weather Forecast
| TONIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  | | |  |  | | | | | |
| Snow | Clearing | Fog | Clearing | Fog | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Cloudy |
| Lo: 25°FLo: -4°C | Hi: 40°FHi: 4°C | Lo: 25°FLo: -4°C | Hi: 46°FHi: 8°C | Lo: 26°FLo: -3°C | Hi: 50°FHi: 10°C | Lo: 30°FLo: -1°C | Hi: 55°FHi: 13°C | Lo: 30°FLo: -1°C | Hi: 56°FHi: 13°C | Lo: 36°FLo: 2°C | Hi: 56°FHi: 13°C |
| POP: 80% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Sun Oct 11 2026 
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Meteorlogic Glosserator
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Issued: 118 PM MDT Sun Oct 11 2026
Discussion
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KEY MESSAGES:- Winter storm continues through early Monday, pass level/higher valley travel impacts
- Hard freeze in western Montana valleys early this week
- Ridging with daytime temperatures to above average by late this week
Winter Impacts: An upper-level trough over the Pacific Northwest will continue to push moisture over the entrenched cold air mass across western Montana. This synoptic setup will yield accumulating snow through early Monday, primarily above 4,000 feet. Expect perio...