Hermiston, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hermiston, a city in Umatilla County, Oregon.
Today
91°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 91. Northeast wind 1 to 7 mph.
7-day forecast for Hermiston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Areas Of Smoke | 1 to 7 mph NE | 0% |
| Tonight | 57°F | Areas Of Smoke | 1 to 6 mph SE | 0% |
| Wednesday | 96°F | Areas Of Smoke | 1 to 5 mph N | 0% |
| Wednesday Night | 60°F | Areas Of Smoke then Clear | 3 mph SW | 0% |
| Thursday | 100°F | Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 66°F | Clear | 2 to 9 mph SW | 0% |
| Friday | 99°F | Sunny | 7 to 13 mph SW | 0% |
| Friday Night | 64°F | Clear | 5 to 10 mph SW | 0% |
| Saturday | 95°F | Sunny | 5 to 9 mph SW | 0% |
| Saturday Night | 62°F | Mostly Clear | 7 to 13 mph SW | 0% |
| Sunday | 90°F | Sunny | 7 to 12 mph SW | 0% |
| Sunday Night | 59°F | Mostly Clear | 9 mph SW | 0% |
| Monday | 89°F | Sunny | 9 mph W | 0% |
| Monday Night | 59°F | Mostly Clear | 6 to 9 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Hermiston (45.833, -119.285). Updated through the day.
Growing snapshot for Hermiston
Last spring frost
Apr 27
First fall frost
Oct 7
Growing season
163 days
Hardiness zone
7b
More local growing data for Hermiston: nearby ZIP 97838 weather · frost dates · planting calendar · Oregon frost dates
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Meacham
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Pendleton
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Umapine
Umatilla
Weston
Climate data from the nearest NOAA station, Hermiston 2 Nw, Or (1.4 mi from Hermiston). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.