San Francisco weather in May 2025

Expect 18°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in San Francisco in May. Check more long-term weather averages for San Francisco in May before you book your next holiday to California in 2025/2026.

  • 18°C maximum daytime temperature in May in San Francisco18
    18°C max day temperature
  • 11 hours of sunshine per day
  • 3 days with some rainfall in May in San Francisco3
    3 days with some rainfall
  • 10°C minimum night-time temperature in May in San Francisco10
    10°C min night temperature
  • 14 hours of daylight per day in May in San Francisco14
    14 hours of daylight per day
  • No heat & humidity in May in San Francisco0
    No heat & humidity
  • 7 mm monthly rainfall in May in San Francisco7
    7 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in San Francisco8
    8 (Very High) UV index
  • 11°C sea temperature in May in San Francisco11
    11°C sea temperature

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The May weather guide for California (San Francisco) 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 San Francisco

How hot is it in San Francisco in May?

Daytime temperatures usually reach 18°C in San Francisco in May, falling to 10°C at night.

How sunny is it in San Francisco in May?

There are normally 11 hours of bright sunshine each day in San Francisco in May - that's 75% of daylight hours.

Is the sea cold around San Francisco in May?

The average sea temperature around San Francisco in May is 11°C.

Does it ever rain in San Francisco in May?

There are usually 3 days with some rain in San Francisco in May and the average monthly rainfall is 7mm.

San Francisco May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:13 19:01
Friday, 16th May 2025 04:59 19:14
Saturday, 31st May 2025 04:50 19:26

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