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Gibson Reservoir Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
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| Chance of T-Storm | Rain Showers | Mostly Clear | Sunny | Mostly Clear | Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Lo: 40°FLo: 4°C | Hi: 50°FHi: 10°C | Lo: 39°FLo: 4°C | Hi: 68°FHi: 20°C | Lo: 46°FLo: 8°C | Hi: 74°FHi: 23°C | Hi: 66°FHi: 19°C Lo: 49°FLo: 9°C | Hi: 66°FHi: 19°C Lo: 49°FLo: 9°C | Hi: 62°FHi: 17°C Lo: 45°FLo: 7°C | Hi: 62°FHi: 17°C Lo: 45°FLo: 7°C | Hi: 62°FHi: 17°C Lo: 42°FLo: 6°C | Hi: 62°FHi: 17°C Lo: 42°FLo: 6°C |
| POP: 50% | POP: 20% | POP: 50% | POP: 50% | POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 452 PM MDT Sat Aug 29 2026 
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Issued: 554 PM MDT Sat Aug 29 2026
Key Messages
- Showers and thunderstorms overnight, some of which could produce gusty winds and brief downpours.
- Cool and breezy Sunday with highs in the 60s for most lower elevation locations, with 50s in the mountains.
- Drier Monday, but showers and thunderstorms return by Tuesday.
Discussion
...- Meteorological Overview:
A deep upper level low moving into the Pacific Northwest will continue to funnel moisture into North Central and Southwestern Montana today on southwesterly flow aloft. Early afterno...