San Francisco Weather & Climate: Best Time to Visit
Temperatures in San Francisco, Spain, vary greatly throughout the year. August is the hottest month at 29°C (84°F), while January is the coldest at 16°C (61°F).
The city tends toward dry conditions, with around 482 mm (19 in) of rainfall per year. It does, however, have a distinct dry season from May to September. The most sunshine falls in July, with an average of 11.6 hours of daily sunshine.
Monthly Temperature in San Francisco
The climate in San Francisco is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in August to a moderate 16°C (61°F) in the coolest month, January.
Nights vary from 22°C (72°F) in August to around 10°C (50°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Francisco
San Francisco maintains relatively dry conditions year-round, recording average annual precipitation of 482 mm (19 in). The climate in San Francisco shows significant variation throughout the year. Expect moderate rainfall in December, the wettest month, with an average of 74 mm (2.9 in) of precipitation over 13 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 1.5 mm (0.1 in) of rainfall over 2 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
Sunshine Hours in San Francisco
For those who appreciate different seasons, San Francisco serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.6 hours of sunshine daily, and embrace the darker days in December, offering only 5.5 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
Water Temperature in San Francisco
The mean water temperature over the year ranges from 16°C (61°F) in February to 24°C (75°F) in August.
Water temperature over the year
Humidity in San Francisco by Month
The relative humidity is high throughout the year in San Francisco.
The city experiences its highest humidity in November, reaching 72%. In June, the humidity drops to its lowest level at 59%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in San Francisco
The mean wind speed varies between 1 m/s (2 knots) and 2 m/s (4 knots) throughout the year. It is lowest in June, July, August, October and November and highest during January, February, March, April, May, September and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
San Francisco 3-Day Forecast
Check the conditions for any month of the year.
