San Francisco, CA Weather
San Francisco, CA climate is mild during summer when temperatures tend to be in the 60's and cool during winter when temperatures tend to be in the 50's.
The warmest month of the year is September with an average maximum temperature of 71.30 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 46.40 degrees Fahrenheit.
Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 14 degrees Fahrenheit, and fairly limited during winter with an average difference of 12 degrees Fahrenheit.
The annual average precipitation at San Francisco is 22.28 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is January with an average rainfall of 4.72 Inches.