San Diego weather in May 2026

Expect daytime maximum temperatures of 70°F in San Diego, California in May based on long-term weather averages. There are 8 hours of sunshine per day on average.

  • 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

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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)

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More about California

How hot is it in San Diego in May?

Daytime temperatures usually reach 73°F in San Diego in May, falling to 55°F at night.

How sunny is it in San Diego in May?

There are normally 9 hours of bright sunshine each day in San Diego in May - that's 65% of daylight hours.

Does it ever rain in San Diego in May?

There is usually 1 day 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 2026. Select a month to view San Diego sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:01 18:30
Saturday, 16th May 2026 04:49 18:41
Sunday, 31st May 2026 04:42 18:51

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