Rock Island, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rock Island, a city in Chelan County, Washington.
Today
92°F
Smoke then Haze
Smoke and haze before 11am, then haze and areas of smoke. Sunny, with a high near 92. Southwest wind 2 to 8 mph.
7-day forecast for Rock Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Smoke then Haze | 2 to 8 mph SW | 0% |
| Tonight | 64°F | Haze | 6 mph NW | 0% |
| Wednesday | 97°F | Smoke | 5 to 9 mph S | 0% |
| Wednesday Night | 66°F | Patchy Smoke then Mostly Clear | 3 to 9 mph W | 0% |
| Thursday | 101°F | Sunny | 2 to 9 mph W | 0% |
| Thursday Night | 68°F | Mostly Clear | 6 to 13 mph W | 0% |
| Friday | 100°F | Sunny | 10 to 22 mph NW | 0% |
| Friday Night | 66°F | Mostly Clear | 12 to 22 mph NW | 0% |
| Saturday | 96°F | Sunny | 8 to 20 mph NW | 0% |
| Saturday Night | 65°F | Mostly Clear | 14 to 20 mph NW | 0% |
| Sunday | 92°F | Sunny | 7 to 14 mph NW | 0% |
| Sunday Night | 63°F | Mostly Clear | 13 to 16 mph NW | 0% |
| Monday | 91°F | Sunny | 5 to 13 mph NW | 0% |
| Monday Night | 62°F | Mostly Clear | 9 to 15 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Rock Island (47.373, -120.142). Updated through the day.
Growing snapshot for Rock Island
Last spring frost
Apr 8
First fall frost
Oct 24
Growing season
200 days
Hardiness zone
7a
More local growing data for Rock Island: nearby ZIP 98828 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Cashmere
Chelan
Chelan Falls
East Wenatchee
Entiat
Leavenworth
Manson
South Wenatchee
Sunnyslope
Wenatchee
Climate data from the nearest NOAA station, Wenatchee Pangborn Ap, Wa (6.2 mi from Rock Island). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.