Hermiston, OR Weather & Growing Conditions
Overnight
34°F
Patchy Fog
Patchy fog. Mostly clear. Low around 34, with temperatures rising to around 36 overnight. South wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 34°F | Patchy Fog | 2 mph S | 0% |
| Wednesday | 54°F | Patchy Fog then Sunny | 2 mph SE | 1% |
| Wednesday Night | 39°F | Chance Rain Showers | 5 mph S | 46% |
| Thursday | 59°F | Mostly Sunny | 2 to 10 mph SW | 14% |
| Thursday Night | 36°F | Partly Cloudy | 5 mph S | 2% |
| Friday | 55°F | Mostly Cloudy | 2 mph S | 2% |
| Friday Night | 38°F | Mostly Cloudy | 2 mph E | 1% |
| Saturday | 59°F | Mostly Sunny | 2 mph N | 1% |
| Saturday Night | 39°F | Mostly Cloudy | 2 mph S | 4% |
| Sunday | 60°F | Mostly Cloudy | 2 to 6 mph SW | 4% |
| Sunday Night | 39°F | Mostly Cloudy | 1 to 5 mph S | 4% |
| Monday | 55°F | Partly Sunny | 2 mph N | 6% |
| Monday Night | 38°F | Mostly Cloudy | 1 mph SE | 14% |
| Tuesday | 59°F | Partly Sunny | 2 mph S | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hermiston, OR
Last spring frost
Apr 27
First fall frost
Oct 7
Growing season
163 days
Hardiness zone
7b
Explore more for Hermiston, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Hermiston 2 Nw, Or (1.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.