San Diego weather in October 2025

Expect 24°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Diego in October. Check more long-term weather averages for San Diego in October before you book your next holiday to California in 2025/2026.

  • 24°C maximum daytime temperature in October in San Diego24
    24°C max day temperature
  • 8 hours of sunshine per day
  • 2 days with some rainfall in October in San Diego2
    2 days with some rainfall
  • 14°C minimum night-time temperature in October in San Diego14
    14°C min night temperature
  • 11 hours of daylight per day in October in San Diego11
    11 hours of daylight per day
  • No heat & humidity in October in San Diego0
    No heat & humidity
  • 8 mm monthly rainfall in October in San Diego8
    8 mm of monthly rainfall
  • UV (maximum) index 6 (High) in October in San Diego6
    6 (High) UV index
  • 19°C sea temperature in October in San Diego19
    19°C sea temperature

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The October 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 October?

Daytime temperatures usually reach 24°C in San Diego in October, falling to 14°C at night.

How sunny is it in San Diego in October?

There are normally 8 hours of bright sunshine each day in San Diego in October - that's 71% of daylight hours.

How warm is the sea around San Diego in October?

The average sea temperature around San Diego in October is 19°C.

Does it ever rain in San Diego in October?

There are usually 2 days with some rain in San Diego in October and the average monthly rainfall is 8mm.

San Diego October sunrise & sunset times

Browse the sunrise and sunset times for San Diego in October 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 October 2025 05:43 17:33
Thursday, 16th October 2025 05:54 17:14
Friday, 31st October 2025 06:06 16:58

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