San Diego weather in December 2023

Expect 19°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Diego in December. Check more long-term weather averages for San Diego in December before you book your next holiday to California in 2023/2024.

  • 19°C maximum daytime temperature in December in San Diego19
    19°C max day temperature
  • 8 hours of sunshine per day
  • 5 days with some rainfall in December in San Diego5
    5 days with some rainfall
  • 8°C minimum night-time temperature in December in San Diego8
    8°C min night temperature
  • 10 hours of daylight per day in December in San Diego10
    10 hours of daylight per day
  • No heat & humidity in December in San Diego0
    No heat & humidity
  • 37 mm monthly rainfall in December in San Diego37
    37 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in December in San Diego3
    3 (Moderate) UV index
  • 15°C sea temperature in December in San Diego15
    15°C sea temperature

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The December weather guide for California (San Diego) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about California

How hot is it in San Diego in December?

Daytime temperatures usually reach 19°C in San Diego in December, falling to 8°C at night.

How sunny is it in San Diego in December?

There are normally 8 hours of bright sunshine each day in San Diego in December - that's 75% of daylight hours.

How warm is the sea around San Diego in December?

The average sea temperature around San Diego in December is 15°C.

Does it rain in San Diego in December?

There are usually 5 days with some rain in San Diego in December and the average monthly rainfall is 37mm.

San Diego December sunrise & sunset times

Browse the sunrise and sunset times for San Diego in December 2023. Select a month to view San Diego sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st December 2023 06:33 16:42
Saturday, 16th December 2023 06:44 16:45
Sunday, 31st December 2023 06:51 16:53

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