Rock Island, WA Weather & Growing Conditions
Today
49°F
Mostly Sunny then Slight Chance Rain Showers
A slight chance of rain showers after 4pm. Mostly sunny. High near 49, with temperatures falling to around 44 in the afternoon. Southeast wind 5 to 8 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 49°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 8 mph SE | 15% |
| Tonight | 37°F | Chance Rain Showers | 3 mph SW | 50% |
| Thursday | 52°F | Sunny | 2 to 7 mph W | 1% |
| Thursday Night | 36°F | Mostly Cloudy | 5 mph NW | 5% |
| Friday | 47°F | Chance Rain Showers | 2 to 6 mph SE | 31% |
| Friday Night | 36°F | Slight Chance Rain Showers | 5 mph NE | 21% |
| Saturday | 52°F | Partly Sunny | 3 to 8 mph NE | 4% |
| Saturday Night | 38°F | Mostly Cloudy | 5 mph NW | 8% |
| Sunday | 54°F | Partly Sunny | 5 to 10 mph W | 8% |
| Sunday Night | 34°F | Mostly Cloudy | 6 mph NW | 0% |
| Monday | 50°F | Partly Sunny | 2 to 7 mph N | 8% |
| Monday Night | 35°F | Chance Rain Showers | 2 mph N | 28% |
| Tuesday | 51°F | Chance Rain And Snow Showers | 1 to 6 mph NE | 31% |
| Tuesday Night | 38°F | Chance Rain Showers | 6 mph N | 31% |
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 (12.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.