Castle Rock, WA Weather & Growing Conditions
Today
89°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 89. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Areas Of Smoke | 5 mph N | 0% |
| Tonight | 57°F | Smoke | 1 to 5 mph N | 0% |
| Wednesday | 94°F | Areas Of Smoke | 3 mph N | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Thursday | 92°F | Sunny | 0 to 3 mph NW | 0% |
| Thursday Night | 56°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Friday | 87°F | Sunny | 0 to 5 mph NW | 0% |
| Friday Night | 54°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Saturday | 82°F | Sunny | 0 to 7 mph NW | 0% |
| Saturday Night | 51°F | Mostly Clear | 0 to 7 mph NNW | 0% |
| Sunday | 76°F | Mostly Sunny | 0 to 6 mph NNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 0 to 6 mph NNW | 0% |
| Monday | 76°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Monday Night | 50°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Castle Rock, WA
Last spring frost
Apr 5
First fall frost
Oct 25
Growing season
196 days
Hardiness zone
8b
Explore more for Castle Rock, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Toledo Faa Ap, Wa (10.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.