Rock Island, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rock Island, a city in Chelan County, Washington.
This Afternoon
82°F
Mostly Sunny
Mostly sunny, with a high near 82. Southeast wind around 7 mph.
7-day forecast for Rock Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Mostly Sunny | 7 mph SE | 0% |
| Tonight | 59°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Sunday | 84°F | Sunny | 2 to 6 mph E | 0% |
| Sunday Night | 59°F | Mostly Clear | 1 to 5 mph NW | 0% |
| Monday | 85°F | Sunny | 5 mph W | 0% |
| Monday Night | 58°F | Partly Cloudy | 3 to 9 mph W | 0% |
| Tuesday | 81°F | Mostly Sunny | 3 to 12 mph NW | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 6 to 12 mph W | 0% |
| Wednesday | 76°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 6 to 9 mph NW | 1% |
| Thursday | 72°F | Mostly Sunny | 2 to 7 mph N | 7% |
| Thursday Night | 52°F | Mostly Cloudy | 6 mph N | 9% |
| Friday | 70°F | Partly Sunny | 6 to 9 mph NW | 9% |
| Friday Night | 49°F | Partly Cloudy | 8 mph NW | 6% |
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 Sep 20, 2026.