San Diego weather in January

Check the Weather in San Diego, California in January before you book your next holiday. This gives the best indication of the weather in January and includes figures for temperature, sunshine and rainfall.

  • 19°C maximum daytime temperature in January in San Diego19
    19°C max day temperature
  • 8 hours of sunshine per day (76% of daylight hours) in January in San Diego8
    8 hours of sunshine per day
  • 6 days with some rainfall in January in San Diego6
    6 days with some rainfall
  • 7°C minimum night-time temperature in January in San Diego7
    7°C 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
  • 53 mm monthly rainfall in January in San Diego53
    53 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in January in San Diego3
    3 (Moderate) UV index
  • 15°C sea temperature in January in San Diego15
    15°C sea temperature

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

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