Tree Reservoir, MT Weather Forecast
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Tree Reservoir Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | MONDAY | TUESDAY |
| Partly Cloudy | Sunny | Mostly Clear | Sunny | Partly Cloudy | Rain | Rain | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 35°FLo: 2°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 31°FLo: -1°C | Hi: 49°FHi: 9°C Lo: 25°FLo: -4°C | Hi: 49°FHi: 9°C Lo: 25°FLo: -4°C | Hi: 49°FHi: 9°C Lo: 25°FLo: -4°C | Hi: 49°FHi: 9°C Lo: 25°FLo: -4°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 326 PM MDT Tue Oct 20 2026 

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Issued: 118 PM MDT Tue Oct 20 2026
Key Messages
- Dry weather conditions will continue into Thursday night.
- Temperatures will remain at or above seasonable norms as well.
- Precipitation chances increase into Friday, with the best chance Friday and Friday night.
- Cooler and drier weather expected for the weekend, with that continuing into early next week.
Discussion
... A weak cold front passed SE through the CWA overnight with a weak surface high expected to pass east over southern Sask overnight tonight.
A fairly large upper low off the...
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