Castle Rock, WA Weather & Growing Conditions
This Afternoon
68°F
Sunny
Sunny, with a high near 68. North northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Sunny | 2 mph NNW | 0% |
| Tonight | 48°F | Areas Of Fog | 2 mph N | 0% |
| Saturday | 74°F | Areas Of Fog then Partly Sunny | 2 mph N | 0% |
| Saturday Night | 48°F | Partly Cloudy then Patchy Fog | 2 mph N | 0% |
| Sunday | 75°F | Patchy Fog then Mostly Sunny | 3 mph N | 0% |
| Sunday Night | 48°F | Partly Cloudy then Areas Of Fog | 0 to 3 mph N | 0% |
| Monday | 71°F | Areas Of Fog then Partly Sunny | 0 to 3 mph NNW | 0% |
| Monday Night | 48°F | Partly Cloudy then Areas Of Fog | 0 to 3 mph NNW | 0% |
| Tuesday | 68°F | Areas Of Fog then Partly Sunny | 0 to 3 mph NNW | 1% |
| Tuesday Night | 45°F | Partly Cloudy then Patchy Fog | 0 to 3 mph NNW | 1% |
| Wednesday | 67°F | Patchy Fog then Mostly Sunny | 1 mph NNW | 1% |
| Wednesday Night | 47°F | Partly Cloudy | 1 mph N | 3% |
| Thursday | 70°F | Partly Sunny | 1 mph NW | 11% |
| Thursday Night | 49°F | Chance Light Rain | 1 mph N | 25% |
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 Sep 19, 2026.