San Diego weather in December (California, United States of America)

How is the weather in San Diego in December? This guide provides all the details you need.

In December, San Diego generally has pleasant temperatures and moderate rainfall. Anticipate daytime temperatures around 19°C, while night temperatures can drop to 9°C. While this is the time of year with slightly cooler averages, it remains comfortably warm.

San Diego in December usually receives moderate rainfall, averaging around 59 mm for the month. With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Delving into the climate records from the past 30 years, one can predict that nearly 7 days of the month will see rainfall.

The days are predominantly sunny, with an estimated total of around 231 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit San Diego. January, February, March, April, May, June, July, August, September, October and November typically offer the best circumstances. While December tends to showcase less optimal conditions.

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

 

San Diego, monthly averages in December

Min Temperature 9°C  
Max Temperature 19°C  
Chance of Rain 23%  
Precipitation 59 mm  
Rainy days 7 days  
Humidity 64%  
Sunshine 231 hours  
Percentage Sunshine 74%  

Where to go in the United States of America in December

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

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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 San Diego in December?

For visitors traveling to San Diego, 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 in December.

Cycling
10/10
Walking
10/10
Camping
4/10
Outdoor sports
10/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in San Diego.

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 climate conditions. Find out where to go with our weather planner.