Riverside, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a community in Umatilla County, Oregon.
This Afternoon
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 76 in the afternoon. West wind around 7 mph.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 7 mph W | 1% |
| Tonight | 48°F | Clear | 3 mph S | 1% |
| Saturday | 79°F | Sunny | 5 mph W | 0% |
| Saturday Night | 48°F | Mostly Clear | 3 mph SE | 0% |
| Sunday | 82°F | Sunny | 1 to 6 mph N | 0% |
| Sunday Night | 50°F | Mostly Clear | 2 to 6 mph E | 0% |
| Monday | 83°F | Sunny | 5 mph W | 0% |
| Monday Night | 51°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 79°F | Sunny | 1 to 6 mph SW | 1% |
| Tuesday Night | 49°F | Partly Cloudy | 5 mph SW | 1% |
| Wednesday | 76°F | Sunny | 5 mph W | 0% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph E | 1% |
| Thursday | 79°F | Sunny | 5 mph NW | 1% |
| Thursday Night | 49°F | Partly Cloudy | 5 mph SW | 6% |
Forecast source: National Weather Service (api.weather.gov) for Riverside (45.677, -118.737). Updated through the day.
Growing snapshot for Riverside
Last spring frost
Apr 22
First fall frost
Oct 9
Growing season
170 days
Hardiness zone
7a
More local growing data for Riverside: nearby ZIP 97801 weather · frost dates · planting calendar · Oregon frost dates
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Climate data from the nearest NOAA station, Pendleton Dwtn, Or (1.3 mi from Riverside). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.