San Francisco CA Temperature Averages by Decade

Summarized here are the temperatures extending over ten decades at San Francisco, California. Listed for every decade from the 1920s to the 2010s are averages for maximum and minimum daily temperatures in degrees Fahrenheit and Celsius. That's followed with information on the number of hot and cold days.

Each decade covers a standard 10-year range. For instance the 1990s includes weather measurements from Jan 1, 1990 to Dec 31, 1999. All the temperature data were collected in downtown San Francisco.

High Temperature for Each Decade

Average daily maximum temperature at San Francisco
High °F	Decade	High °C
64.2	2010s	17.9
64.1	2000s	17.8
66.1	1990s	19.0
65.1	1980s	18.4
62.4	1970s	16.9
62.2	1960s	16.8
62.6	1950s	17.0
62.5	1940s	16.9
63.9	1930s	17.7
63.7	1920s	17.6

Low Temperature for Each Decade

Average daily minimum temperature at San Francisco
Low °F	Decade	Low °C
51.9	2010s	11.1
50.9	2000s	10.5
51.6	1990s	10.9
51.5	1980s	10.9
51.2	1970s	10.6
51.0	1960s	10.6
50.7	1950s	10.4
51.2	1940s	10.7
51.0	1930s	10.6
50.8	1920s	10.4

Hot Days per Decade

Total days per year on average when the temperature in San Francisco reached at least 70 or 90 °F
Decade	70 °F 21 °C	90 °F 32 °C
2010s	67	3
2000s	64	3
1990s	105	4
1980s	91	4
1970s	51	3
1960s	50	1
1950s	50	1
1940s	45	1
1930s	68	2
1920s	68	2

Cold Days per Decade

Total days per year on average when the temperature in San Francisco dropped to 32 °F or lower
Decade	32 °F 0 °C
2010s	0
2000s	0
1990s	0
1980s	0
1970s	0
1960s	0
1950s	0
1940s	0
1930s	1
1920s	0

San Francisco - Temperature Averages by Decade

High Temperature for Each Decade

Low Temperature for Each Decade

Hot Days per Decade

Cold Days per Decade

Reference

More on Temperatures in San Francisco