San Francisco December 20 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	59	53	1.21	n/a
2022	54	44	0.00	n/a
2021	54	45	0.00	n/a
2020	58	45	0.00	n/a
2019	59	50	0.00	n/a
2018	55	50	0.00	n/a
2017	54	47	0.13	n/a
2016	56	45	0.00	n/a
2015	56	45	1.08	n/a
2014	61	55	0.04	n/a
2013	58	44	0.00	n/a
2012	58	43	0.00	0.0
2011	59	45	0.00	0.0
2010	54	49	0.04	0.0
2009	61	48	0.02	n/a
2008	51	41	0.00	n/a
2007	54	47	0.48	n/a
2006	54	41	0.00	n/a
2005	65	52	0.17	n/a
2004	53	43	0.00	n/a
2003	56	49	0.49	n/a
2002	56	46	0.71	n/a
2001	54	47	0.64	n/a
2000	63	49	0.00	n/a
1999	72	55	0.00	n/a
1998	44	38	0.09	0.0
1997	58	45	0.02	n/a
1996	54	43	0.06	n/a
1995	60	47	0.00	n/a
1994	54	42	0.00	n/a
1993	50	40	0.00	n/a
1992	57	47	0.00	n/a
1991	60	42	0.00	n/a
1990	49	34	0.00	n/a
1989	50	42	0.00	n/a
1988	52	46	1.30	n/a
1987	52	45	0.00	n/a
1986	59	45	0.00	n/a
1985	60	42	0.00	n/a
1984	55	44	0.00	n/a
1983	53	43	0.00	n/a
1982	58	50	0.31	n/a
1981	60	53	1.28	n/a
1980	60	51	0.00	n/a
1979	55	51	0.12	n/a
1978	51	41	0.00	n/a
1977	54	49	0.00	n/a
1976	65	48	0.00	n/a
1975	56	46	0.00	n/a
1974	49	44	0.00	n/a
1973	61	48	0.00	n/a
1972	57	52	0.00	0.0
1971	48	44	0.00	0.0
1970	50	42	0.77	0.0
1969	65	58	2.49	0.0
1968	47	40	0.00	0.0
1967	52	39	0.00	0.0
1966	51	41	0.00	0.0
1965	50	41	0.00	0.0
1964	63	57	0.15	0.0
1963	57	47	0.09	0.0
1962	60	47	0.00	0.0
1961	59	55	0.05	0.0
1960	59	50	0.00	0.0
1959	57	50	0.00	0.0
1958	57	51	0.00	0.0
1957	59	49	0.09	0.0
1956	47	41	0.00	0.0
1955	62	58	0.06	0.0
1954	49	39	0.00	0.0
1953	63	52	0.07	0.0
1952	54	47	0.12	0.0
1951	51	41	0.00	0.0
1950	57	52	0.00	0.0
1949	54	42	0.00	0.0
1948	49	41	0.00	0.0
1947	53	49	0.86	0.0
1946	52	41	0.00	0.0
1945	56	46	0.19	0.0
1944	65	54	0.01	0.0
1943	55	50	0.54	0.0
1942	49	44	0.12	0.0
1941	56	50	0.17	0.0
1940	62	57	0.23	0.0
1939	62	50	0.00	0.0
1938	53	48	0.00	0.0
1937	63	52	0.00	0.0
1936	54	46	0.03	0.0
1935	63	49	0.00	0.0
1934	52	46	0.00	0.0
1933	55	46	0.00	0.0
1932	47	42	0.07	0.0
1931	52	48	0.85	0.0
1930	57	49	0.00	0.0
1929	67	56	0.00	0.0
1928	54	43	0.00	0.0
1927	54	43	0.00	0.0
1926	54	44	0.22	0.0
1925	56	47	0.00	0.0
1924	48	39	0.70	0.0
1923	57	44	0.00	0.0
1922	60	45	0.00	0.0
1921	56	47	0.44	0.0

What's the all-time high for San Francisco on 12/20?

For the date of Dec 20, the highest temperature ever reached in San Francisco history is 72 °F which happened in 1999.

Highest Temperatures in San Francisco on December 20

Rank	Temperature	Year
1	72 °F	1999
2	67 °F	1929
3	65 °F	2005
3	65 °F	1944
3	65 °F	1969
3	65 °F	1976
7	63 °F	1935
7	63 °F	1953
7	63 °F	1937
7	63 °F	1964
7	63 °F	2000

What's the all-time low for San Francisco on 12/20?

For the date of Dec 20, the lowest temperature ever reached in San Francisco history is 34 °F which happened in 1990.

Lowest Temperatures in San Francisco on December 20

Rank	Temperature	Year
1	34 °F	1990
2	38 °F	1998
3	39 °F	1967
3	39 °F	1954
3	39 °F	1924
6	40 °F	1968
6	40 °F	1993
8	41 °F	1965
8	41 °F	1978
8	41 °F	1951
8	41 °F	1948
8	41 °F	2008
8	41 °F	1966
8	41 °F	1956
8	41 °F	2006
8	41 °F	1946

Lowest High Temperatures in San Francisco on December 20

Rank	Temperature	Year
1	44 °F	1998
2	47 °F	1932
2	47 °F	1968
2	47 °F	1956
5	48 °F	1971
5	48 °F	1924
7	49 °F	1948
7	49 °F	1974
7	49 °F	1942
7	49 °F	1990
7	49 °F	1954

What's the most it has ever rained in San Francisco on 12/20?

For the date of Dec 20, the most precipitation ever recorded in San Francisco history is 2.49 inches which happened in 1969.

All-Time Most Precipitation in San Francisco on December 20

Rank	Precipitation	Year
1	2.49 inches	1969
2	1.30 inches	1988
3	1.28 inches	1981
4	1.21 inches	2023
5	1.08 inches	2015
6	0.86 inches	1947
7	0.85 inches	1931
8	0.77 inches	1970
9	0.71 inches	2002
10	0.70 inches	1924

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location