San Diego weather in January 2025

Expect 19°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Diego in January. Check more long-term weather averages for San Diego in January before you book your next holiday to California in 2025/2026.

  • 19°C maximum daytime temperature in January in San Diego19
    19°C max day temperature
  • 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

More about San Diego

San Diego by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for San Diego

  • Save on summer & winter sun holidays with TUI
  • Book online & save with top deals & free child places
  • Pay £0 deposits with direct debit & spread the cost

TUITUI deal finder

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 / mm)  |  Imperial (°F / inches)

Back to top

More about California

How hot is it in San Diego in January?

Daytime temperatures usually reach 19°C in San Diego in January, falling to 7°C at night.

How sunny is it in San Diego in January?

There are normally 8 hours of bright sunshine each day in San Diego in January - that's 76% of daylight hours.

How warm is the sea around San Diego in January?

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

Does it rain in San Diego in January?

There are usually 6 days with some rain in San Diego in January and the average monthly rainfall is 53mm.

San Diego January sunrise & sunset times

Browse the sunrise and sunset times for San Diego in January 2025. Select a month to view San Diego sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 06:51 16:54
Thursday, 16th January 2025 06:51 17:07
Friday, 31st January 2025 06:44 17:21

Related posts

Popular travel offers

Explore holidays in the sun for less

Top ^