San Francisco Weather and Climate: A Comprehensive Guide
San Francisco experiences great temperature shifts.
The city's weather can transition from warm days
to mild weather.
It typically sees modest rainfall throughout the year.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
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 in August to a moderate 16°C in the coolest month, January.
Nights are cooler, with lows often dropping to around 10°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
San Francisco maintains relatively dry conditions year-round, recording average annual precipitation of 482 mm. The climate in San Francisco shows significant variation throughout the year. Expect moderate rainfall in December, with an average of 74 mm of precipitation over 13 rainy days. In contrast, July offers drier and sunnier days, with around 1.5 mm 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 over the year
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
Average water temperature
The mean water temperature over the year ranges from 16°C in February to 24°C in August.
Water temperature over the year
Average humidity
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%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed varies between 1 m/s and 2 m/s throughout the year. It is lowest in June, July, August, October and November and highest during January, February, March, April, May, September and December.
The mean monthly wind speed over the year (meters per second)
clear and no rain clear and no rain almost clear and no rainForecast for San Francisco
3 m/s
3 m/s
5 m/s
The best time of year to visit San Francisco in Spain
During the months of May, June, September and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
Yes, the months of June, July and August are very dry.
August has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 16°C.
December tops the wettest month list with 74 mm of rainfall.
July is the driest month with 2 mm of precipitation.
July is the sunniest month with an average of 348 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
