Riverside, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a town in Okanogan County, Washington.
Tonight
52°F
Mostly Clear
Mostly clear. Low around 52, with temperatures rising to around 54 overnight. Northwest wind 2 to 6 mph.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear | 2 to 6 mph NW | 0% |
| Saturday | 79°F | Mostly Sunny | 2 to 12 mph SE | 0% |
| Saturday Night | 51°F | Partly Cloudy | 2 to 7 mph W | 0% |
| Sunday | 80°F | Sunny | 3 to 12 mph E | 0% |
| Sunday Night | 52°F | Mostly Clear | 3 to 10 mph NE | 0% |
| Monday | 80°F | Sunny | 1 to 10 mph W | 0% |
| Monday Night | 52°F | Partly Cloudy | 3 to 10 mph NW | 0% |
| Tuesday | 76°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Tuesday Night | 50°F | Partly Cloudy | 3 to 10 mph W | 1% |
| Wednesday | 72°F | Mostly Sunny | 5 to 10 mph N | 2% |
| Wednesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NW | 2% |
| Thursday | 73°F | Partly Sunny | 8 mph N | 8% |
| Thursday Night | 51°F | Mostly Cloudy | 3 to 8 mph W | 9% |
| Friday | 71°F | Partly Sunny | 7 to 10 mph SW | 11% |
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 Sep 19, 2026.