San Francisco April 20 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2024	62	51	0.00	n/a
2023	63	47	0.00	n/a
2022	66	51	0.11	n/a
2021	58	49	0.00	n/a
2020	59	52	0.00	n/a
2019	58	51	0.01	n/a
2018	65	49	0.00	n/a
2017	63	54	0.01	n/a
2016	71	55	0.00	n/a
2015	59	52	0.00	n/a
2014	75	51	0.00	n/a
2013	71	51	0.00	n/a
2012	77	55	0.00	n/a
2011	63	53	0.04	0.0
2010	59	48	0.69	0.0
2009	93	62	0.00	n/a
2008	53	42	0.00	0.0
2007	59	46	0.10	0.0
2006	65	48	0.00	n/a
2005	60	48	0.00	n/a
2004	63	53	0.05	0.0
2003	58	50	0.00	n/a
2002	57	48	0.00	n/a
2001	54	45	0.91	n/a
2000	67	52	0.00	n/a
1999	60	49	0.00	n/a
1998	67	50	0.00	n/a
1997	68	57	0.00	n/a
1996	63	49	0.00	n/a
1995	58	49	0.08	n/a
1994	63	50	0.00	n/a
1993	71	52	0.00	n/a
1992	71	55	0.00	0.0
1991	63	51	0.63	n/a
1990	65	53	0.01	n/a
1989	68	53	0.00	n/a
1988	61	51	0.17	n/a
1987	82	52	0.00	n/a
1986	84	57	0.00	n/a
1985	56	49	0.14	n/a
1984	61	46	0.00	n/a
1983	67	53	0.00	n/a
1982	76	55	0.00	n/a
1981	62	50	0.00	n/a
1980	63	48	0.10	n/a
1979	62	49	0.00	n/a
1978	57	50	0.05	n/a
1977	55	46	0.00	n/a
1976	68	49	0.00	n/a
1975	67	49	0.00	n/a
1974	60	50	0.00	n/a
1973	67	53	0.00	0.0
1972	55	47	0.00	0.0
1971	52	46	0.04	0.0
1970	57	46	0.00	0.0
1969	68	49	0.00	0.0
1968	59	48	0.00	0.0
1967	56	45	0.10	0.0
1966	62	49	0.00	0.0
1965	63	57	0.30	0.0
1964	54	48	0.00	0.0
1963	52	42	0.22	0.0
1962	60	48	0.00	0.0
1961	58	46	0.00	0.0
1960	63	50	0.00	0.0
1959	57	49	0.00	0.0
1958	73	56	0.00	0.0
1957	58	47	0.09	0.0
1956	67	48	0.00	0.0
1955	55	49	0.16	0.0
1954	62	52	0.00	0.0
1953	58	49	0.00	0.0
1952	70	50	0.00	0.0
1951	54	47	0.00	0.0
1950	68	51	0.00	0.0
1949	67	51	0.00	0.0
1948	58	50	0.00	n/a
1947	62	49	0.00	0.0
1946	62	49	0.00	0.0
1945	54	47	0.00	0.0
1944	54	47	0.00	0.0
1943	62	52	0.00	0.0
1942	65	53	0.00	0.0
1941	69	50	0.00	0.0
1940	69	49	0.00	0.0
1939	53	47	0.00	0.0
1938	57	50	0.00	0.0
1937	73	50	0.00	0.0
1936	61	50	0.00	0.0
1935	64	51	0.00	0.0
1934	64	50	0.00	0.0
1933	57	49	0.00	0.0
1932	54	47	0.00	0.0
1931	84	53	0.00	0.0
1930	71	55	0.00	0.0
1929	60	50	0.00	0.0
1928	60	50	0.00	0.0
1927	75	48	0.00	0.0
1926	68	56	0.00	0.0
1925	54	47	0.07	0.0
1924	58	48	0.00	0.0
1923	63	49	0.00	0.0
1922	63	48	0.00	0.0
1921	64	51	0.00	0.0

What's the all-time high for San Francisco on 4/20?

For the date of Apr 20, the highest temperature ever reached in San Francisco history is 93 °F which happened in 2009.

Highest Temperatures in San Francisco on April 20

Rank	Temperature	Year
1	93 °F	2009
2	84 °F	1986
2	84 °F	1931
4	82 °F	1987
5	77 °F	2012
6	76 °F	1982
7	75 °F	2014
7	75 °F	1927
9	73 °F	1937
9	73 °F	1958

What's the all-time low for San Francisco on 4/20?

For the date of Apr 20, the lowest temperature ever reached in San Francisco history is 42 °F which has happened 2 times, most recently in 2008.

Lowest Temperatures in San Francisco on April 20

Rank	Temperature	Year
1	42 °F	2008
1	42 °F	1963
3	45 °F	1967
3	45 °F	2001
5	46 °F	2007
5	46 °F	1984
5	46 °F	1970
5	46 °F	1961
5	46 °F	1977
5	46 °F	1971

Lowest High Temperatures in San Francisco on April 20

Rank	Temperature	Year
1	52 °F	1963
1	52 °F	1971
3	53 °F	2008
3	53 °F	1939
5	54 °F	1945
5	54 °F	1932
5	54 °F	1964
5	54 °F	1925
5	54 °F	1944
5	54 °F	1951
5	54 °F	2001

What's the most it has ever rained in San Francisco on 4/20?

For the date of Apr 20, the most precipitation ever recorded in San Francisco history is 0.91 inches which happened in 2001.

All-Time Most Precipitation in San Francisco on April 20

Rank	Precipitation	Year
1	0.91 inches	2001
2	0.69 inches	2010
3	0.63 inches	1991
4	0.30 inches	1965
5	0.22 inches	1963
6	0.17 inches	1988
7	0.16 inches	1955
8	0.14 inches	1985
9	0.11 inches	2022
10	0.10 inches	1967
10	0.10 inches	1980
10	0.10 inches	2007

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location