Costa Mesa weather in December (California, United States of America)

Will it be rainy or sunny in Costa Mesa this December? Want to know if this month is ideal for visiting? Our guide provides detailed weather information.

Temperatures

In December, Costa Mesa tends to experience pleasant temperatures and moderate rainfall. You can expect daytime temperatures to reach around 19°C, while the nights will see a decline to about 9°C. Enjoy a month of comfortably warm temperatures, despite being cooler than other months.

Precipitation

Costa Mesa in December usually receives moderate rainfall, averaging around 55 mm for the month. As the month with the highest rainfall, make sure to have an umbrella to manage the showers. Rain is expected on roughly 7 days.

Average sunshine

Expect a lot of sunshine this month, with about 205 hours of sunny weather. The abundant sunlight creates a lively and bright atmosphere.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Costa Mesa. January, February, March, April, May, June, July, August, September, October and November typically offer the most agreeable circumstances. On the other hand, December tends to be characterized by conditions that may not be as optimal.

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

 

Costa Mesa, monthly averages in December

Min Temperature 9°C  

Max Temperature 19°C  

Chance of Rain 24%  

Precipitation 55 mm  

Rainy days 7 days  

Sunshine 205 hours *  

Percentage Sunshine *  

Data from: Corona, the United States of America (39 KM, 24 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?

For visitors traveling to Costa Mesa, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Cycling

10/10

Walking

10/10

Camping

4/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Costa Mesa.

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.