San Francisco April 21 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2024	68	52	0.00	n/a
2023	72	52	0.00	n/a
2022	62	51	0.25	n/a
2021	54	48	0.00	n/a
2020	63	51	0.00	n/a
2019	63	49	0.00	n/a
2018	71	49	0.00	n/a
2017	72	53	0.00	n/a
2016	68	59	0.00	n/a
2015	55	52	0.00	n/a
2014	63	51	0.01	n/a
2013	76	50	0.00	n/a
2012	79	55	0.00	n/a
2011	59	48	0.09	n/a
2010	56	48	0.01	0.0
2009	87	64	0.00	n/a
2008	55	44	0.00	0.0
2007	58	49	0.14	0.0
2006	63	49	0.00	n/a
2005	68	48	0.00	n/a
2004	59	50	0.04	0.0
2003	56	47	0.14	n/a
2002	60	46	0.00	n/a
2001	59	43	0.00	n/a
2000	60	51	0.00	n/a
1999	58	48	0.00	n/a
1998	84	50	0.00	n/a
1997	65	54	0.00	n/a
1996	65	50	0.00	n/a
1995	69	46	0.00	n/a
1994	64	52	0.00	n/a
1993	67	54	0.00	n/a
1992	65	52	0.00	0.0
1991	66	51	0.17	n/a
1990	60	51	0.00	n/a
1989	63	52	0.09	n/a
1988	62	49	0.00	n/a
1987	90	55	0.00	n/a
1986	75	53	0.00	n/a
1985	60	50	0.13	n/a
1984	68	47	0.00	n/a
1983	60	52	0.00	n/a
1982	78	63	0.00	n/a
1981	63	50	0.00	n/a
1980	54	48	0.01	n/a
1979	64	50	0.10	n/a
1978	59	49	0.00	n/a
1977	60	44	0.00	n/a
1976	57	47	0.00	n/a
1975	54	48	0.00	n/a
1974	54	48	0.00	n/a
1973	71	56	0.00	0.0
1972	62	47	0.00	0.0
1971	53	43	0.00	0.0
1970	54	44	0.00	0.0
1969	60	49	0.00	0.0
1968	58	48	0.00	0.0
1967	54	42	0.46	0.0
1966	65	49	0.00	0.0
1965	66	53	0.01	0.0
1964	59	47	0.00	0.0
1963	57	46	0.01	0.0
1962	67	50	0.00	0.0
1961	57	48	0.38	0.0
1960	56	47	0.00	0.0
1959	58	49	0.00	0.0
1958	72	53	0.00	0.0
1957	61	49	0.00	0.0
1956	64	49	0.00	0.0
1955	59	50	0.52	0.0
1954	65	50	0.00	0.0
1953	60	49	0.00	0.0
1952	66	48	0.00	0.0
1951	55	47	0.00	0.0
1950	57	49	0.00	0.0
1949	68	51	0.00	0.0
1948	56	49	0.05	n/a
1947	62	48	0.00	0.0
1946	64	50	0.00	0.0
1945	62	48	0.00	0.0
1944	60	46	0.00	0.0
1943	61	53	0.03	0.0
1942	58	54	0.00	0.0
1941	60	51	0.00	0.0
1940	58	49	0.00	0.0
1939	54	48	0.00	0.0
1938	58	50	0.00	0.0
1937	57	48	0.00	0.0
1936	65	53	0.14	0.0
1935	59	52	0.00	0.0
1934	65	54	0.00	0.0
1933	57	48	0.00	0.0
1932	60	46	0.00	0.0
1931	72	49	0.00	0.0
1930	70	56	0.00	0.0
1929	59	49	0.01	0.0
1928	68	50	0.00	0.0
1927	80	53	0.00	0.0
1926	71	54	0.00	0.0
1925	63	47	0.00	0.0
1924	60	48	0.00	0.0
1923	57	47	0.00	0.0
1922	57	47	0.00	0.0
1921	76	52	0.00	0.0

What's the all-time high for San Francisco on 4/21?

For the date of Apr 21, the highest temperature ever reached in San Francisco history is 90 °F which happened in 1987.

Highest Temperatures in San Francisco on April 21

Rank	Temperature	Year
1	90 °F	1987
2	87 °F	2009
3	84 °F	1998
4	80 °F	1927
5	79 °F	2012
6	78 °F	1982
7	76 °F	2013
7	76 °F	1921
9	75 °F	1986
10	72 °F	1931
10	72 °F	2017
10	72 °F	2023
10	72 °F	1958

What's the all-time low for San Francisco on 4/21?

For the date of Apr 21, the lowest temperature ever reached in San Francisco history is 42 °F which happened in 1967.

Lowest Temperatures in San Francisco on April 21

Rank	Temperature	Year
1	42 °F	1967
2	43 °F	2001
2	43 °F	1971
4	44 °F	1970
4	44 °F	2008
4	44 °F	1977
7	46 °F	1995
7	46 °F	1944
7	46 °F	1932
7	46 °F	2002
7	46 °F	1963

Lowest High Temperatures in San Francisco on April 21

Rank	Temperature	Year
1	53 °F	1971
2	54 °F	1967
2	54 °F	1980
2	54 °F	1974
2	54 °F	1975
2	54 °F	2021
2	54 °F	1939
2	54 °F	1970
9	55 °F	2008
9	55 °F	1951
9	55 °F	2015

What's the most it has ever rained in San Francisco on 4/21?

For the date of Apr 21, the most precipitation ever recorded in San Francisco history is 0.52 inches which happened in 1955.

All-Time Most Precipitation in San Francisco on April 21

Rank	Precipitation	Year
1	0.52 inches	1955
2	0.46 inches	1967
3	0.38 inches	1961
4	0.25 inches	2022
5	0.17 inches	1991
6	0.14 inches	2007
6	0.14 inches	2003
6	0.14 inches	1936
9	0.13 inches	1985
10	0.10 inches	1979

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location