San Diego Weather in December

What's the weather like in San Diego (California) in December 2023?

The climate in San Diego during December can be summarized as mild and reasonably dry.

December is in the winter in San Diego and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 8°C (46°F) is normal.

San Diego weather averages (imperial / metric)
Daytime temperature 19.1°C 66.4°F
Nightly temperature 7.5°C 45.5°F
Average temperature 13.3°C 55.9°F
Daily sunshine 8.2 hrs
Avg rainfall 37 mm 1.5 ins
Rainy days 5 days
Sea temperature 15.9°C 60.7°F
Humidity 65%
Windspeed 10.8kph 7 mph

On average December is the 4th wettest month of the year in San Diego with around 37mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.2 hours of sunshine per day.

December temperatures in San Diego

San Diego average temperature in December

December rainfall

San Diego average rain in December

December hourly sunshine

San Diego average rain in December

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Diego in December 2023.

Other monthly averages

Best places to visit in December

UV index Best time to go?

San Diego weather stats

San Diego weather statistics
Hottest month: August 26.7°C 80.1°F
Driest month: July 1mm 0ins
Sunniest month: January 8.5hrs
Coldest month: January 18.4°C 65.1°F
Wettest month: January 53mm 2.1ins
Map showing location of San Diego (32.71533, -117.15726)

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