San Diego weather in January 2027

Expect daytime maximum temperatures of 66°F in San Diego, California in January based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 2.1 inches of rainfall in the month.

  • 66°F maximum daytime temperature in January in San Diego66
    66°F max day temperature
  • 8 hours of sunshine per day
  • 6 days with some rainfall in January in San Diego6
    6 days with some rainfall
  • 45°F minimum night-time temperature in January in San Diego45
    45°F min night temperature
  • 10 hours of daylight per day in January in San Diego10
    10 hours of daylight per day
  • No heat & humidity in January in San Diego0
    No heat & humidity
  • 2.1 inches monthly rainfall in January in San Diego2.1
    2.1 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in January in San Diego3
    3 (Moderate) UV index
  • 59°F sea temperature in January in San Diego59
    59°F sea temperature

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The January 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)  |  Imperial (°F)

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How hot is it in San Diego in January?

Daytime temperatures usually reach 68°F in San Diego in January, falling to 46°F at night.

How sunny is it in San Diego in January?

There are normally 7 hours of bright sunshine each day in San Diego in January - that's 70% of daylight hours.

Does it rain in San Diego in January?

There are usually 5 days with some rain in San Diego in January and the average monthly rainfall is 3.1 inches.

San Diego January sunrise & sunset times

Browse the sunrise and sunset times for San Diego in January 2027. Select a month to view San Diego sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st January 2027 06:51 16:54
Saturday, 16th January 2027 06:51 17:06
Sunday, 31st January 2027 06:44 17:20

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