San Francisco weather in May 2021

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  • 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 San Francisco, California 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.

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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 sunrise & sunset times for May 2021

Browse the sunrise & sunset times for San Francisco in May 2021. Select a month to view San Francisco sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st May 2021 06:13 20:01
Sunday, 16th May 2021 05:59 20:14
Monday, 31st May 2021 05:50 20:26
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is hot in California in May for 2021/2022?

Below are average maximum temperatures at popular destinations in California in May. Select a destination to see more weather parameters.

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