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, 48°F | Humidity: 71% | Dewpoint: 39°F |
| Wind Speed: SE 10.4 MPH (9 KT) | Heat Index: 48°F | ||
| Barometer: 30.30 in. | Wind Chill: 43°F |
Weather Forecast
 | Tonight: Rain likely. Lows around 40. Light wind. | |
| Lo: 40°F | ||
| Hi: 50°F | Tuesday: Cloudy with a chance of rain. Highs around 50. Southeast wind 5 to 10 mph. |
| Lo: 40°F | ||
 | Hi: 50°F | Wednesday: Mostly cloudy with a slight chance of rain willapa hills. Highs around 50. South wind 5 to 15 mph. |
| Lo: 40°F | ||
| Hi: 50°F | Thanksgiving day: Rain likely. Highs around 50. |
| Lo: 40°F | ||
 | Hi: 45°F | Friday: Showers likely. Highs around 45. |
| Lo: 38°F | ||
| Hi: 45°F | Saturday: Mostly cloudy with a chance of showers. Highs around 45. |
| Lo: 35°F | ||
| Hi: 48°F | Sunday: Patchy fog in the morning. Mostly cloudy with a slight chance of showers. Highs 45 to 50. |
| Lo: 35°F |
Moon, Sunrise and Sunset
 |
Moon Phase: First Quarter Moon | Civil Twilight: 6:49 AM PST |
Sunrise: 7:23 AM PST |
| Sunset: 4:32 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 |
