Riverside, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a town in Okanogan County, Washington.
Today
88°F
Haze
Haze and areas of smoke before 2pm, then smoke and haze. Sunny, with a high near 88. Northeast wind 3 to 10 mph.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Haze | 3 to 10 mph NE | 0% |
| Tonight | 58°F | Smoke | 3 to 7 mph NW | 0% |
| Wednesday | 93°F | Smoke | 6 to 13 mph N | 0% |
| Wednesday Night | 61°F | Smoke then Mostly Clear | 5 to 13 mph N | 0% |
| Thursday | 97°F | Sunny | 3 to 14 mph E | 0% |
| Thursday Night | 64°F | Mostly Clear | 5 to 14 mph W | 0% |
| Friday | 97°F | Sunny | 5 to 15 mph W | 0% |
| Friday Night | 63°F | Mostly Clear | 8 to 15 mph NW | 0% |
| Saturday | 94°F | Sunny | 6 to 13 mph N | 0% |
| Saturday Night | 61°F | Mostly Clear | 13 mph W | 0% |
| Sunday | 91°F | Sunny | 7 to 10 mph N | 0% |
| Sunday Night | 60°F | Mostly Clear | 9 to 13 mph NW | 0% |
| Monday | 90°F | Sunny | 8 to 13 mph N | 1% |
| Monday Night | 59°F | Mostly Clear | 9 to 13 mph SW | 1% |
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 Aug 4, 2026.