Rock Island, WA Weather & Growing Conditions
Overnight
31°F
Mostly Clear
Mostly clear, with a low around 31. Northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 31°F | Mostly Clear | 2 mph NW | 1% |
| Wednesday | 47°F | Sunny | 0 to 8 mph SW | 11% |
| Wednesday Night | 37°F | Chance Rain Showers | 0 to 3 mph NE | 35% |
| Thursday | 51°F | Sunny | 1 to 6 mph W | 1% |
| Thursday Night | 36°F | Partly Cloudy | 3 mph NW | 10% |
| Friday | 46°F | Mostly Cloudy | 0 to 5 mph E | 10% |
| Friday Night | 36°F | Mostly Cloudy | 3 mph NE | 6% |
| Saturday | 50°F | Partly Sunny | 6 mph N | 2% |
| Saturday Night | 38°F | Mostly Cloudy | 5 mph NW | 12% |
| Sunday | 51°F | Partly Sunny | 3 to 8 mph W | 12% |
| Sunday Night | 35°F | Mostly Cloudy | 6 mph NW | 3% |
| Monday | 48°F | Partly Sunny | 1 to 6 mph N | 14% |
| Monday Night | 35°F | Slight Chance Rain Showers | 2 mph N | 23% |
| Tuesday | 48°F | Slight Chance Rain Showers | 1 to 5 mph E | 23% |
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 (7.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.