San Diego weather in May 2025

Expect 70°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Diego in May. Check more long-term weather averages for San Diego in May before you book your next holiday to California in 2025/2026.

  • 70°F maximum daytime temperature in May in San Diego70
    70°F max day temperature
  • 8 hours of sunshine per day
  • 2 days with some rainfall in May in San Diego2
    2 days with some rainfall
  • 55°F minimum night-time temperature in May in San Diego55
    55°F min night temperature
  • 14 hours of daylight per day in May in San Diego14
    14 hours of daylight per day
  • No heat & humidity in May in San Diego0
    No heat & humidity
  • 0.2 inches monthly rainfall in May in San Diego0.2
    0.2 inches of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in San Diego9
    9 (Very High) UV index
  • 63°F sea temperature in May in San Diego63
    63°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 May 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 May?

Daytime temperatures usually reach 70°F in San Diego in May, falling to 55°F at night.

How sunny is it in San Diego in May?

There are normally 8 hours of bright sunshine each day in San Diego in May - that's 61% of daylight hours.

How warm is the sea around San Diego in May?

The average sea temperature around San Diego in May is 63°F.

Does it ever rain in San Diego in May?

There are usually 2 days with some rain in San Diego in May and the average monthly rainfall is 0.2 inches.

San Diego May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:01 18:31
Friday, 16th May 2025 04:49 18:42
Saturday, 31st May 2025 04:42 18:51

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^