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City of Hermiston, OregonHermiston, OR Weather Forecast
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Hermiston Weather Forecast
| REST OF TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY |
 |  | | |  |  | | | |  | |
| Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Mostly Clear | Mostly Clear | Chance of Showers | Chance of Showers | Mostly Sunny |
| Hi: 63°FHi: 17°C | Lo: 37°FLo: 3°C | Hi: 69°FHi: 21°C | Lo: 40°FLo: 4°C | Hi: 63°FHi: 17°C | Lo: 40°FLo: 4°C | Hi: 60°FHi: 16°C Lo: 36°FLo: 2°C | Hi: 60°FHi: 16°C Lo: 36°FLo: 2°C | Hi: 59°FHi: 15°C Lo: 33°FLo: 1°C | Hi: 59°FHi: 15°C Lo: 33°FLo: 1°C | Hi: 57°FHi: 14°C |
| POP: 50% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1132 AM PDT Tue Oct 20 2026 
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Issued: 1037 AM PDT Tue Oct 20 2026
Key Messages
- Warm and dry conditions through Wednesday.
- Breezy to windy westerly winds through the Eastern Columbia River Gorge/Cascade Gaps Thursday Night.
- Slight chances (15-25%) for thunderstorms across the Wallowas and Blue Mountains of Oregon, wetting rains, and breezy winds.
Discussion
... A band of thick clouds were spreading north out of southern Oregon into Central Oregon this morning, with thinner clouds across the foothills and Columbia Basin region and radar returns from MRMS had faded....