Castle Rock (WA) Weather and Climate: A Comprehensive Guide
The climate in Castle Rock is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to cold in the cooler months.
It also has a relatively rain/snowy climate with high levels of precipitation.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
In Castle Rock, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 26°C in August to a chilly 7°C in December.
Nighttime temperatures can drop, with average lows reaching 1°C in December. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Castle Rock experiences significant rain/snowfall throughout the year, averaging 1336 mm of precipitation annually. The seasons in Castle Rock, bring significant changes in precipitation. The wettest month, January, receives heavy rainfall, with an average of 207 mm of precipitation. This rainfall is distributed across 21 rainy days. In contrast, the driest month, July, experiences much less rainfall, totaling 12 mm over 5 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Castle Rock Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Castle Rock, summer days are longer and more sunny, with daily sunshine hours peaking at 11.0 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.1 hours per average day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
overcast and rain broken clouds and rain broken clouds and rainForecast for Castle Rock (WA)
5 m/s
5 m/s
3 m/s
The best time of year to visit Castle Rock in the United States of America
During the months of June, July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Rainy season in Castle Rock occurs in the months of January, March, November and December.
Yes, the months of July and August are very dry.
August has an average maximum temperature of 26°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 7°C.
January tops the wettest month list with 207 mm of rainfall.
July is the driest month with 12 mm of precipitation.
July is the sunniest month with an average of 330 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
