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.

Which is the hottest month in San Francisco?

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

Which month has the most rain in San Francisco?

In terms of rainfall, January is usually the wettest month in San Francisco with 125mm on average. There are normally 10 days in January 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)
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Apr
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Aug
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Oct
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Dec

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

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