Shell Reservoir, MT Weather Forecast
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Shell Reservoir Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
| Chance of Showers | Rain Showers | Clouds | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Sunny | Partly Cloudy | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 50°FLo: 10°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C |
| POP: 30% | POP: 20% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1244 AM MDT Mon Sep 21 2026 

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Issued: 1235 AM MDT Mon Sep 21 2026
Key Messages
- Areas of fog through the morning commute.
- Warmer and drier for the work week. 80s return midweek.
- Scattered showers and storms late Tuesday into Wednesday.
Discussion
... Next 7 Days...
As the slow moving upper level low finally makes its exit to our east, we will see clearing skies and temps return to average. While the next system to impact the region will zip through Tuesday and Wednesday, the next large weather maker could impact us this weekend, however a lot of uncertainty remains...
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