San Francisco Weather Facts, Averages and Records
Presented here are weather facts, averages and records for the city of San Francisco, California. Included in the data are average and record weather temperatures, rain records and annual averages and snowfall total averages and records for the City by the Bay San Francisco, California.
The weather data for San Francisco is from the National Weather Service.
Temperature Data for San Francisco
Record hottest temperature ever recorded in San Francisco is 103 degrees which occurred on June 14, 2000 and July 17, 1988.
Record coldest temperature ever recorded in San Francisco is 27 degrees which occurred on December 11, 1932.
The average annual temperature in San Francisco is 57.3 degrees.
The coldest month is January with an average daily mean temperature of 51 degrees. The hottest month is September with an average temperature of 62.7 degrees.
The warmest year on record is 1992 with an annual average temperature of 60.8 degrees.
The coldest year on record is 1955 with an annual average temperature 55.2 degrees.
The average annual daily high temperature for San Francisco is 63.6 degrees.
The average annual daily low temperature for San Francisco is 51 degrees.
The average annual humidity level in San Francisco is 68.3%.
Rainfall Data for San Francisco
The average annual rainfall total is 21.14 inches.
The wettest year on record is 1983 with 43.75 inches of rain.
The driest year on record is 1976 with 8.73 inches of rain.
The rainiest month on average is January with 4.14 inches of rain followed by December with 4.08.
The driest month on average is July with .02 inches of rain followed by August with .05.
Snowfall Totals for San Francisco
Accumulated snow is a rare event in San Francisco, California. Dating back to 1856 there have been just 7 times when 1 inch or more of snow fell in the city. The greatest amount of snow ever in San Francisco occurred on February 5, 1887 when 3.7 inches of snow fell.
Snow is a bit more common in the mountains and hills around the city. In the city itself trace amounts of snow can fall but it usually melts fairly quickly.
Sunshine Totals in San Francisco, California
The average annual sunshine percentage in the city of San Francisco is 66%. Cities in the United States also with 66% sunshine levels include Salt Lake City, Utah, Tampa, Florida, Macon, Georgia and Cheyenne, Wyoming.
Wind in San Francisco
The average annual wind speed in San Francisco is 8.7 mph while at the airport its 10.6 mph.
For more see Tallest Buildings and Structures in San Francisco