Waste Reservoir, MT Weather Forecast
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Waste Reservoir Weather Forecast
| REST OF TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY |
| Mostly Cloudy | Mostly Cloudy | Sunny | Partly Cloudy | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 60°FHi: 16°C | Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Hi: 75°FHi: 24°C Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1241 PM MDT Fri Oct 02 2026 

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Issued: 109 PM MDT Fri Oct 2 2026
Key Messages
- Seasonable temperatures and dry conditions will prevail through the weekend.
- Monday looks to feature markedly warmer temperatures with highs in the 70s and 80s.
Discussion
...Synoptic Setup: Anomalously strong upper ridging for this time of year moves in from the west over the weekend. This will lead to much warmer than average temperatures next week. After a brief cool down tomorrow, highs in the afternoon climb to the 80s on Monday. The remainder of the week looks to remain warm and ...
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