San Diego weather in October 2025

Expect 75°F 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.

  • 75°F maximum daytime temperature in October in San Diego75
    75°F max day temperature
  • 8 hours of sunshine per day
  • 2 days with some rainfall in October in San Diego2
    2 days with some rainfall
  • 57°F minimum night-time temperature in October in San Diego57
    57°F 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
  • 0.3 inches monthly rainfall in October in San Diego0.3
    0.3 inches of monthly rainfall
  • UV (maximum) index 6 (High) in October in San Diego6
    6 (High) UV index
  • 66°F sea temperature in October in San Diego66
    66°F sea temperature

More about San Diego

San Diego by month

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

Recommended for California

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

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)  |  Imperial (°F)

Back to top

More about California

How hot is it in San Diego in October?

Daytime temperatures usually reach 75°F in San Diego in October, falling to 57°F 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 66°F.

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 0.3 inches.

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^