San Francisco weather

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The weather guide for San Francisco, California shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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When is it hottest in San Francisco?

The hottest time of year in San Francisco is normally September. Expect maximum daytime temperatures to reach 22°C.

What is the wettest month in San Francisco?

In terms of rainfall, January usually gets the most rainfall in San Francisco with 125mm on average. In January there are normally 10 days with some rain.

When is it sunniest in San Francisco?

The sunniest time of year in San Francisco is normally April with bright sunshine on average for 78% of daylight hours; that's 10 hours of sunshine per day.

When is the sea warmest in San Francisco?

The sea is usually at its warmest in San Francisco in September when the water temperature reaches 14°C.

Metric (°C / mm)  |  Imperial (°F / inches)

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Compare San Francisco weather with the USA

Below the San Francisco weather chart shows average maximum daytime temperature for San Francisco, California, USA and the USA (Washington).

Maximum daytime temperature (°C)

San Francisco, California, USA
USA (Washington)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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Where's hot in California right now?

Below are the temperatures expected today at popular destinations in California. Select a destination to compare today's forecast with average weather conditions.

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