Castle Rock weather in December (Washington State, United States of America)

Wondering what the weather is like in Castle Rock during December? Wondering about the weather this month? Our guide has all the details you need.

Temperatures

During December, Castle Rock usually has low temperatures and heavy rainfall. December is part of the winter season. As the day progresses, temperatures can peak at 7°C. Luckily at nightfall, they typically drop to 1°C. Expect the coldest temperatures of the year this month. Make sure you have enough winter clothing to stay warm.

Precipitation

Castle Rock in December falls under the rainy season with heavy rainfall, averaging around 206 mm for the month. Expect around 23 days of rain based on historical data.

Average sunshine

This month sees fewer sunny days, with about 62 hours of sunshine, perfect for those who enjoy cooler temperatures.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Castle Rock. June, July, August and September generally stand out with the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Castle Rock climate page with graphs.

 

Castle Rock, monthly averages in December

Min Temperature 1°C  

Max Temperature 7°C  

Chance of Rain 75%  

Precipitation 206 mm  

Rainy days 23 days  

Sunshine 62 hours *  

Percentage Sunshine *  

* Data from: Astoria, the United States of America (71 KM, 44 Miles).

Where to go in the United States of America in December

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

Wear a base layer in cold weather; this is the #1 thing you can do to increase your overall body temperature.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

3/10

Outdoor sports

4/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Castle Rock.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.