San Francisco May 21 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	65	50	0.00	n/a
2022	68	50	0.00	n/a
2021	61	49	0.00	n/a
2020	67	53	0.00	n/a
2019	59	52	0.20	n/a
2018	61	50	0.00	n/a
2017	69	52	0.00	n/a
2016	62	52	0.00	n/a
2015	64	53	0.03	n/a
2014	67	52	0.00	n/a
2013	61	51	0.00	0.0
2012	59	50	0.00	n/a
2011	60	51	0.00	n/a
2010	58	49	0.00	n/a
2009	61	48	0.00	n/a
2008	63	51	0.00	n/a
2007	67	49	0.00	n/a
2006	67	54	0.26	n/a
2005	69	53	0.00	n/a
2004	60	52	0.00	n/a
2003	63	49	0.00	n/a
2002	59	50	0.16	n/a
2001	70	52	0.00	n/a
2000	90	57	0.00	n/a
1999	66	48	0.00	0.0
1998	60	51	0.00	n/a
1997	67	53	0.00	n/a
1996	69	53	0.20	n/a
1995	58	54	0.00	n/a
1994	64	51	0.00	n/a
1993	71	58	0.00	n/a
1992	77	54	0.00	n/a
1991	65	50	0.00	n/a
1990	70	54	0.00	n/a
1989	62	50	0.00	n/a
1988	79	53	0.00	n/a
1987	62	51	0.00	n/a
1986	62	51	0.00	n/a
1985	73	51	0.00	n/a
1984	68	49	0.00	n/a
1983	70	53	0.00	n/a
1982	57	49	0.00	n/a
1981	60	51	0.00	n/a
1980	58	51	0.00	n/a
1979	64	57	0.00	n/a
1978	59	52	0.00	n/a
1977	59	50	0.00	n/a
1976	61	50	0.00	n/a
1975	70	50	0.00	n/a
1974	63	48	0.00	n/a
1973	61	51	0.00	n/a
1972	62	53	0.00	0.0
1971	62	47	0.00	0.0
1970	64	49	0.00	0.0
1969	57	50	0.00	0.0
1968	62	55	0.00	0.0
1967	75	50	0.00	0.0
1966	54	49	0.00	0.0
1965	58	50	0.00	0.0
1964	66	49	0.00	0.0
1963	59	52	0.00	0.0
1962	64	50	0.00	0.0
1961	58	52	0.00	0.0
1960	56	48	0.00	0.0
1959	68	51	0.00	0.0
1958	66	54	0.01	0.0
1957	64	51	0.00	0.0
1956	64	49	0.00	0.0
1955	62	48	0.00	0.0
1954	65	49	0.00	0.0
1953	60	49	0.15	0.0
1952	65	50	0.00	0.0
1951	59	49	0.00	0.0
1950	57	49	0.00	0.0
1949	65	52	0.00	0.0
1948	65	50	0.00	n/a
1947	59	50	0.00	0.0
1946	56	49	0.04	0.0
1945	59	51	0.00	0.0
1944	60	51	0.00	0.0
1943	69	50	0.00	0.0
1942	63	53	0.00	0.0
1941	79	57	0.00	0.0
1940	63	54	0.00	0.0
1939	62	54	0.02	0.0
1938	59	50	0.00	0.0
1937	59	48	0.00	0.0
1936	71	55	0.00	0.0
1935	83	53	0.00	0.0
1934	72	53	0.00	0.0
1933	56	49	0.08	0.0
1932	61	53	0.00	0.0
1931	70	54	0.00	0.0
1930	66	50	0.00	0.0
1929	61	50	0.00	0.0
1928	60	52	0.00	0.0
1927	64	50	0.00	0.0
1926	72	55	0.00	0.0
1925	65	54	0.00	0.0
1924	59	52	0.00	0.0
1923	61	51	0.00	0.0
1922	62	49	0.00	0.0
1921	68	48	0.03	0.0

What's the all-time high for San Francisco on 5/21?

For the date of May 21, the highest temperature ever reached in San Francisco history is 90 °F which happened in 2000.

Highest Temperatures in San Francisco on May 21

Rank	Temperature	Year
1	90 °F	2000
2	83 °F	1935
3	79 °F	1988
3	79 °F	1941
5	77 °F	1992
6	75 °F	1967
7	73 °F	1985
8	72 °F	1926
8	72 °F	1934
10	71 °F	1993
10	71 °F	1936

What's the all-time low for San Francisco on 5/21?

For the date of May 21, the lowest temperature ever reached in San Francisco history is 47 °F which happened in 1971.

Lowest Temperatures in San Francisco on May 21

Rank	Temperature	Year
1	47 °F	1971
2	48 °F	1937
2	48 °F	1921
2	48 °F	1955
2	48 °F	2009
2	48 °F	1999
2	48 °F	1974
2	48 °F	1960
9	49 °F	2010
9	49 °F	1982
9	49 °F	1950
9	49 °F	1946
9	49 °F	1933
9	49 °F	1951
9	49 °F	2007
9	49 °F	1966
9	49 °F	1964
9	49 °F	1956
9	49 °F	1970
9	49 °F	1922
9	49 °F	1984
9	49 °F	1954
9	49 °F	2003
9	49 °F	2021
9	49 °F	1953

Lowest High Temperatures in San Francisco on May 21

Rank	Temperature	Year
1	54 °F	1966
2	56 °F	1960
2	56 °F	1933
2	56 °F	1946
5	57 °F	1969
5	57 °F	1982
5	57 °F	1950
8	58 °F	2010
8	58 °F	1961
8	58 °F	1980
8	58 °F	1995
8	58 °F	1965

What's the most it has ever rained in San Francisco on 5/21?

For the date of May 21, the most precipitation ever recorded in San Francisco history is 0.26 inches which happened in 2006.

All-Time Most Precipitation in San Francisco on May 21

Rank	Precipitation	Year
1	0.26 inches	2006
2	0.20 inches	2019
2	0.20 inches	1996
4	0.16 inches	2002
5	0.15 inches	1953
6	0.08 inches	1933
7	0.04 inches	1946
8	0.03 inches	2015
8	0.03 inches	1921
10	0.02 inches	1939

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location