Hermiston, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hermiston, a city in Umatilla County, Oregon.
Tonight
33°F
Patchy Fog
Patchy fog after 7pm. Partly cloudy, with a low around 33. South wind 1 to 5 mph.
7-day forecast for Hermiston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 33°F | Patchy Fog | 1 to 5 mph S | 2% |
| Wednesday | 54°F | Patchy Fog then Sunny | 2 mph S | 1% |
| Wednesday Night | 39°F | Chance Rain Showers | 1 to 5 mph S | 47% |
| Thursday | 59°F | Patchy Fog then Mostly Sunny | 3 to 12 mph SW | 19% |
| Thursday Night | 37°F | Partly Cloudy | 5 mph S | 7% |
| Friday | 57°F | Mostly Cloudy | 2 mph SW | 7% |
| Friday Night | 39°F | Mostly Cloudy | 3 mph S | 4% |
| Saturday | 59°F | Partly Sunny | 3 mph E | 1% |
| Saturday Night | 40°F | Mostly Cloudy | 3 mph S | 8% |
| Sunday | 61°F | Partly Sunny | 3 to 8 mph SW | 13% |
| Sunday Night | 39°F | Mostly Cloudy | 3 mph S | 7% |
| Monday | 56°F | Mostly Cloudy | 2 mph N | 11% |
| Monday Night | 39°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph S | 18% |
| Tuesday | 60°F | Slight Chance Rain Showers | 2 mph W | 22% |
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
Nearby towns & communities
Adams
Athena
Cayuse
Echo
Gopher Flats
Green Meadows
Helix
Kirkpatrick
McKay
Meacham
Milton-Freewater
Mission
Pendleton
Pilot Rock
Riverside
Stanfield
Tutuilla
Ukiah
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 Nov 4, 2026.