Big Dam, MT Weather Forecast
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Big Dam Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
| Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Chance of Rain | Rain and Snow | Rain and Snow | Light Snow | Snow and Rain |
| Hi: 77°FHi: 25°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C | Hi: 78°FHi: 26°C Lo: 45°FLo: 7°C | Hi: 78°FHi: 26°C Lo: 45°FLo: 7°C | Lo: 39°FLo: 4°C | Hi: 49°FHi: 9°C | Lo: 25°FLo: -4°C | Hi: 39°FHi: 4°C | Lo: 25°FLo: -4°C |
| POP: 20% | POP: 50% | POP: 70% | POP: 60% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 AM MDT Tue Oct 06 2026 

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Issued: 1139 PM MDT Mon Oct 5 2026
Key Messages
- Warm and dry conditions will prevail throughout this work week.
- A cooler and wetter system is expected this weekend.
- There is the potential for snow levels to drop low enough for lower elevation snow Sunday and Monday.
Discussion
... /Issued 532 PM MDT Mon Oct 5 2026/- Meteorological Overview:
The ridge continues to flatten today, causing increased westerly flow aloft. These winds have been mixing down to the surface, causing breezy conditions, which are expected to dissipate this evenin...
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