Rock Island, WA Weather & Growing Conditions
Overnight
57°F
Mostly Clear
Mostly clear. Low around 57, with temperatures rising to around 59 overnight. Northwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Mostly Clear | 7 mph NW | 0% |
| Saturday | 75°F | Mostly Sunny | 2 to 8 mph E | 0% |
| Saturday Night | 58°F | Mostly Clear | 2 to 6 mph W | 0% |
| Sunday | 76°F | Sunny | 2 to 7 mph E | 0% |
| Sunday Night | 58°F | Mostly Clear | 2 to 6 mph W | 0% |
| Monday | 77°F | Sunny | 2 to 6 mph NW | 0% |
| Monday Night | 57°F | Partly Cloudy | 5 to 10 mph NW | 0% |
| Tuesday | 73°F | Mostly Sunny | 3 to 9 mph NW | 0% |
| Tuesday Night | 53°F | Partly Cloudy | 5 to 12 mph W | 0% |
| Wednesday | 69°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Wednesday Night | 52°F | Mostly Cloudy | 6 to 10 mph NW | 1% |
| Thursday | 66°F | Partly Sunny | 3 to 7 mph N | 6% |
| Thursday Night | 52°F | Mostly Cloudy | 5 to 8 mph NW | 9% |
| Friday | 63°F | Mostly Sunny | 7 to 10 mph NW | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rock Island, WA
Last spring frost
Apr 8
First fall frost
Oct 24
Growing season
200 days
Hardiness zone
7a
Explore more for Rock Island, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Wenatchee Pangborn Ap, Wa (6.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.