San Francisco Weather & Climate: Best Time to Visit

In San Francisco temperatures are generally consistent throughout the year. Typically, average maximum daytime temperatures range from a comfortable 23°C (73°F) in August to a pleasant 22°C (72°F) in the coolest month, January.

Nights vary from 14°C (57°F) in August to around 13°C (55°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

San Francisco experiences significant rainfall throughout the year, averaging 3260 mm (128 in) of precipitation annually. The climate in San Francisco shows significant variation throughout the year. Expect heavy rainfall in April, the wettest month, with an average of 385 mm (15 in) of precipitation over 18 rainy days.

In contrast, the driest month August offers drier and sunnier days, with around 173 mm (6.8 in) of rainfall over 14 rainy days. For more details, please visit our San Francisco Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, San Francisco serves as an ideal destination. Expect longer, more sun-filled days in January with an average of 5.2 hours of sunshine daily, and embrace the darker days in May, offering only 2.8 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in San Francisco.

The city experiences its highest humidity in April, reaching 77%. In July, the humidity drops to its lowest level at 74%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year