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Summit Trail Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
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| Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Sunny |
| Lo: 41°FLo: 5°C | Hi: 56°FHi: 13°C | Lo: 45°FLo: 7°C | Hi: 55°FHi: 13°C | Lo: 45°FLo: 7°C | Hi: 52°FHi: 11°C | Lo: 43°FLo: 6°C | Hi: 54°FHi: 12°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C Lo: 46°FLo: 8°C | Hi: 61°FHi: 16°C Lo: 46°FLo: 8°C | Hi: 63°FHi: 17°C |
| POP: 50% | POP: 50% | POP: 70% | POP: 90% | POP: 90% | POP: 90% | POP: 80% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 336 PM MDT Fri Sep 04 2026 
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Issued: 151 PM MDT Fri Sep 4 2026
Key Messages
- It will be windy across North-central, Central, and Southwestern Montana this afternoon with isolated showers and thunderstorms.
- Widespread showers and isolated thunderstorms will affect North-central, Central, and Southwestern Montana Sunday through early next week.
- It will cool off this weekend though early next week.
Discussion
...- Meteorological Overview:
This afternoon an upper-level closed low is over Washington and Oregon with southerly flow over North-central, Central, and South...