San Francisco, California gets 25 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Francisco averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 259 sunny days per year in San Francisco. The US average is 205 sunny days.
San Francisco gets some kind of precipitation, on average, 72 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Summer High: the July high is around 67 degrees
Winter Low: the January low is 46
Rain: averages 25 inches of rain a year
Snow: averages 0 inches of snow a year
SPERLING'S COMFORT INDEX
San Francisco ranks 84/100 for Comfort Index
A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.