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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

WhenTempForecastWindPrecip
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

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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.