Riverside, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a town in Okanogan County, Washington.
Tonight
34°F
Partly Cloudy
Partly cloudy, with a low around 34. North wind around 6 mph.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 34°F | Partly Cloudy | 6 mph N | 2% |
| Wednesday | 52°F | Sunny | 2 to 10 mph S | 1% |
| Wednesday Night | 38°F | Chance Rain Showers | 6 mph S | 27% |
| Thursday | 53°F | Mostly Sunny | 3 to 10 mph S | 13% |
| Thursday Night | 37°F | Mostly Cloudy | 6 to 9 mph S | 14% |
| Friday | 51°F | Mostly Cloudy | 9 to 18 mph S | 14% |
| Friday Night | 36°F | Mostly Cloudy | 3 to 9 mph S | 9% |
| Saturday | 53°F | Mostly Cloudy | 6 mph S | 8% |
| Saturday Night | 38°F | Slight Chance Rain Showers | 3 to 13 mph S | 15% |
| Sunday | 55°F | Partly Sunny | 7 to 18 mph S | 13% |
| Sunday Night | 36°F | Mostly Cloudy | 3 to 7 mph W | 4% |
| Monday | 51°F | Partly Sunny then Slight Chance Rain Showers | 3 to 7 mph E | 23% |
| Monday Night | 37°F | Chance Rain Showers | 6 mph S | 41% |
| Tuesday | 52°F | Chance Rain Showers | 5 to 8 mph S | 44% |
Forecast source: National Weather Service (api.weather.gov) for Riverside (48.513, -119.516). Updated through the day.
Growing snapshot for Riverside
Last spring frost
Apr 30
First fall frost
Oct 7
Growing season
160 days
Hardiness zone
6b
More local growing data for Riverside: nearby ZIP 98849 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Brewster
Conconully
Coulee Dam
Disautel
Elmer City
Loomis
Malott
Methow
Nespelem
North Omak
Okanogan
Omak
Oroville
Pateros
Tonasket
Twisp
Winthrop
Climate data from the nearest NOAA station, Omak Ap, Wa (7.4 mi from Riverside). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.