Horse Spring Reservoir, OR Weather Forecast
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Horse Spring Reservoir Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
| Clearing | Smoke | Chance of T-Storm | Rain Showers | Rain Showers | Chance of Showers | Rain Showers | Chance of T-Storm | Chance of Showers | Partly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 78°FHi: 26°C | Lo: 47°FLo: 8°C | Hi: 64°FHi: 18°C | Lo: 44°FLo: 7°C | Hi: 59°FHi: 15°C | Lo: 39°FLo: 4°C | Hi: 62°FHi: 17°C | Lo: 36°FLo: 2°C | Hi: 68°FHi: 20°C | Lo: 39°FLo: 4°C | Hi: 70°FHi: 21°C | Lo: 40°FLo: 4°C |
| POP: 90% | POP: 80% | POP: 50% | POP: 40% | POP: 30% | POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1136 PM PDT Mon Aug 31 2026 

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Issued: 1231 AM MDT Tue Sep 1 2026
Key Messages
- Warm today and Tuesday.
- Isolated thunderstorms in S-central ID this evening, increasing across Central ID Tuesday afternoon/evening.
- A strong low pressure system later this week will bring cooler and windier conditions with periods of showers and thunderstorms, especially to Oregon and west-central Idaho.
Aviation
/06Z Tuesday through Wednesday/... Issued 1225 AM MDT TUE SEP 1 2026 VFR in most areas of southwestern Idaho and southeastern Oregon through Wednesday. Expect some reduction ...
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