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Groundhog Reservoir Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT |
 |  |  |  |  | |  |  | | | |  |
| Windy | Rain Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Rain Showers | Sunny | Patchy Fog | Sunny | Chance of T-Storm | Chance of Showers | Chance of Showers |
| Hi: 73°FHi: 23°C | Lo: 49°FLo: 9°C | Hi: 64°FHi: 18°C | Lo: 44°FLo: 7°C | Hi: 67°FHi: 19°C | Lo: 42°FLo: 6°C | Hi: 72°FHi: 22°C | Lo: 44°FLo: 7°C | Hi: 77°FHi: 25°C | Lo: 46°FLo: 8°C | Hi: 72°FHi: 22°C | Lo: 44°FLo: 7°C |
| POP: 80% | POP: 80% | POP: 80% | POP: 40% | POP: 30% | POP: 40% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1241 AM MDT Wed Sep 02 2026 
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Issued: 1232 AM MDT Wed Sep 2 2026
Key Messages
- Isolated to scattered thunderstorms tonight through Wednesday morning, mainly across the mountains of central Idaho.
- Widespread showers and embedded thunderstorms across much of southeast Oregon and west-central Idaho Wednesday night through Thursday with significant rainfall totals possible.
- Much cooler this week, with highs 10-20 degrees below normal by Thursday with periods of gusty winds.
- Additional wet and cool weather anticipated late this weekend into early next week.
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