Castle Rock, WA Weather
Castle Rock, WA climate is mild during summer when temperatures tend to be in the 60's and cold during winter when temperatures tend to be in the 40's.
The warmest month of the year is August with an average maximum temperature of 77.50 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 33.80 degrees Fahrenheit.
Temperature variations between night and day tend to be moderate during summer with a difference that can reach 25 degrees Fahrenheit, and fairly limited during winter with an average difference of 14 degrees Fahrenheit.
The annual average precipitation at Castle Rock is 48.02 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is November with an average rainfall of 7.44 Inches.
Weather Data
Current Conditions
|
Overcast, 39°F | Humidity: 93% | Dewpoint: 37°F |
| Wind Speed: CALM | Heat Index: 39°F | ||
| Barometer: 30.29 in. | Wind Chill: 39°F |
Weather Forecast
 | Tonight: Partly cloudy with areas of fog. Fog May be locally dense. Lows around 35. Light wind. | |
| Lo: 35°F | ||
| Hi: 48°F | Sunday: Partly sunny. Areas of fog in the morning. Highs 45 to 50. East wind 5 to 10 mph. |
| Lo: 35°F | ||
 | Hi: 53°F | Monday: Mostly sunny. Highs 50 to 55. Southeast wind 5 to 10 mph. |
| Lo: 40°F | ||
 | Hi: 50°F | Tuesday: Mostly cloudy with a slight chance of showers. Highs around 50. |
| Lo: 40°F | ||
 | Hi: 50°F | Wednesday: Partly sunny. Highs around 50. |
| Lo: 40°F | ||
| Hi: 50°F | Thanksgiving day: Mostly cloudy with a slight chance of rain. Highs around 50. |
| Lo: 40°F | ||
 | Hi: 50°F | Friday: Partly cloudy with a slight chance of showers. Highs around 50. |
| Lo: 38°F |
Moon, Sunrise and Sunset
 |
Moon Phase: Waning Crescent Moon | Civil Twilight: 6:50 AM PST |
Sunrise: 7:23 AM PST |
| Sunset: 4:31 PM PST |
Civil Twilight: 5:05 PM PST |
Normal Climate
Normal Temperatures
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °F | 45.9 | 50.4 | 55.6 | 60.5 | 66.6 | 71.1 | 76.5 | 77.5 | 73.2 | 62.7 | 51.5 | 45.5 | 61.4 |
| Mean °F | 39.9 | 42.8 | 46.4 | 50.1 | 55.5 | 60.1 | 64.5 | 65.0 | 61.2 | 53.0 | 45.0 | 40.0 | 52.0 |
| Min °F | 33.8 | 35.1 | 37.2 | 39.7 | 44.4 | 49.0 | 52.5 | 52.4 | 49.1 | 43.2 | 38.4 | 34.5 | 42.4 |
Normal Precipitation
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch | 6.35 | 5.23 | 4.66 | 3.72 | 2.80 | 2.25 | 1.04 | 1.25 | 2.32 | 3.76 | 7.44 | 7.20 | 48.02 |
