Hermiston, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hermiston, a city in Umatilla County, Oregon.
This Afternoon
81°F
Sunny
Sunny. High near 81, with temperatures falling to around 79 in the afternoon. West wind 2 to 6 mph.
7-day forecast for Hermiston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Sunny | 2 to 6 mph W | 1% |
| Tonight | 52°F | Clear | 3 mph S | 1% |
| Saturday | 81°F | Sunny | 3 mph W | 0% |
| Saturday Night | 52°F | Partly Cloudy | 3 mph E | 0% |
| Sunday | 84°F | Sunny | 3 mph N | 0% |
| Sunday Night | 55°F | Mostly Clear | 3 mph E | 0% |
| Monday | 85°F | Sunny | 3 mph SW | 0% |
| Monday Night | 55°F | Mostly Clear | 5 mph SW | 0% |
| Tuesday | 81°F | Sunny | 5 mph SW | 0% |
| Tuesday Night | 53°F | Mostly Clear | 7 mph SW | 0% |
| Wednesday | 77°F | Sunny | 5 mph W | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph S | 0% |
| Thursday | 80°F | Mostly Sunny | 3 mph W | 1% |
| Thursday Night | 53°F | Partly Cloudy | 3 mph SW | 5% |
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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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 Sep 18, 2026.