San Luis Obispo December 20 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of December 20.
December 20 All-Time Records
1893–2024
Highest temperature 80 °F 2020
Lowest temperature 24 °F 1971
Lowest daily high 49 °F 1967
Highest daily low 59 °F 1969
Most precipitation 1.52 inches 1952
December 20 Average Weather
1991–2020 1
Average high 64.9 °F
Average low 40.9 °F
Chance precipitation 27.4%
San Luis Obispo December 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 63 56 1.49 n/a
2022 64 30 0.00 n/a
2021 56 42 0.00 n/a
2020 80 39 0.00 n/a
2019 70 38 0.00 0.0
2018 67 41 0.00 0.0
2017 59 39 0.07 n/a
2016 73 33 0.00 0.0
2015 61 41 0.00 0.0
2014 65 52 0.00 0.0
2013 65 36 0.00 0.0
2012 60 29 0.00 0.0
2011 64 34 0.00 n/a
2010 54 50 0.81 n/a
2009 68 44 0.00 n/a
2008 63 41 0.00 n/a
2007 56 44 0.08 n/a
2006 59 30 0.00 n/a
2005 73 43 0.01 n/a
2004 64 35 0.00 n/a
2003 60 50 0.05 n/a
2002 57 42 0.29 n/a
2001 59 46 0.56 n/a
2000 78 34 0.00 n/a
1999 80 41 0.00 n/a
1998 56 34 0.00 0.0
1997 61 45 0.00 0.0
1996 70 39 0.00 0.0
1995 66 36 0.00 0.0
1994 65 41 0.00 0.0
1993 64 44 0.00 0.0
1992 58 34 0.00 0.0
1991 60 39 0.00 0.0
1990 54 33 0.25 0.0
1989 66 35 0.00 0.0
1988 60 36 0.14 n/a
1987 60 38 0.00 0.0
1986 60 42 0.39 0.0
1985 80 44 0.00 0.0
1984 56 40 0.53 0.0
1983 58 44 0.00 0.0
1982 70 41 0.00 0.0
1981 68 45 n/a 0.0
1980 61 42 0.00 0.0
1979 60 41 0.00 0.0
1978 55 40 0.00 0.0
1977 68 41 0.00 0.0
1976 72 40 0.00 0.0
1975 64 33 0.00 0.0
1974 65 n/a 0.00 0.0
1973 73 39 0.00 0.0
1972 65 51 0.00 0.0
1971 60 24 0.00 0.0
1970 52 36 0.31 0.0
1969 59 59 0.49 0.0
1968 54 38 0.06 0.0
1967 49 31 0.00 0.0
1966 75 39 0.00 0.0
1965 64 37 0.00 0.0
1964 57 50 0.81 0.0
1963 67 40 0.00 0.0
1962 65 53 0.00 0.0
1961 65 44 0.00 0.0
1960 70 55 0.00 0.0
1959 74 47 0.00 0.0
1958 60 36 0.00 0.0
1957 61 49 0.00 0.0
1956 75 41 0.00 0.0
1955 62 54 0.55 0.0
1954 75 44 0.00 0.0
1953 71 52 0.00 0.0
1952 54 48 1.52 0.0
1951 55 38 0.09 0.0
1950 71 43 0.00 0.0
1949 55 37 0.00 0.0
1948 58 42 0.00 0.0
1947 54 42 0.00 0.0
1946 67 41 0.00 0.0
1945 64 44 0.01 0.0
1944 68 43 0.04 0.0
1943 65 53 0.05 0.0
1942 64 34 0.00 n/a
1941 59 50 0.10 n/a
1940 68 47 n/a n/a
1939 64 42 0.00 n/a
1938 52 50 0.50 n/a
1937 71 44 0.00 n/a
1936 69 48 n/a n/a
1935 70 44 0.00 n/a
1934 69 51 0.00 n/a
1933 70 36 0.00 n/a
1932 58 43 0.15 n/a
1931 67 47 0.00 n/a
1930 59 39 0.00 n/a
1929 68 52 0.00 n/a
1928 67 31 0.00 n/a
1927 60 38 0.00 n/a
1926 n/a n/a n/a n/a
1925 n/a n/a n/a n/a
1924 n/a n/a n/a n/a
1923 n/a n/a n/a n/a
1922 n/a n/a n/a n/a
1921 n/a n/a n/a n/a
1920 n/a n/a n/a n/a
1919 n/a n/a n/a n/a
1918 n/a n/a n/a n/a
1917 n/a n/a n/a n/a
1916 n/a n/a 0.00 n/a
1915 n/a n/a n/a n/a
1914 n/a n/a 0.36 n/a
1913 n/a n/a 0.17 n/a
1912 n/a n/a n/a n/a
1911 n/a n/a n/a n/a
1910 n/a n/a n/a n/a
1909 n/a n/a 0.41 n/a
1908 n/a n/a 0.00 n/a
1907 n/a n/a 0.10 n/a
1906 n/a n/a 0.00 0.0
1905 n/a n/a n/a n/a
1904 n/a n/a n/a n/a
1903 n/a n/a n/a n/a
1902 n/a n/a n/a n/a
1901 n/a n/a n/a n/a
1900 n/a n/a n/a n/a
1899 n/a n/a n/a n/a
1898 n/a n/a n/a n/a
1897 n/a n/a n/a n/a
1896 n/a n/a n/a n/a
1895 n/a n/a 0.50 n/a
1894 n/a n/a 0.21 n/a
1893 n/a n/a 0.00 n/a
What's the all-time high for San Luis Obispo on 12/20?
For the date of Dec 20, the highest temperature ever reached in San Luis Obispo history is 80 °F which has happened 3 times, most recently in 2020.
Highest Temperatures in San Luis Obispo on December 20
Rank Temperature Year
1 80 °F 1985
1 80 °F 2020
1 80 °F 1999
4 78 °F 2000
5 75 °F 1956
5 75 °F 1954
5 75 °F 1966
8 74 °F 1959
9 73 °F 1973
9 73 °F 2005
9 73 °F 2016
What's the all-time low for San Luis Obispo on 12/20?
For the date of Dec 20, the lowest temperature ever reached in San Luis Obispo history is 24 °F which happened in 1971.
Lowest Temperatures in San Luis Obispo on December 20
Rank Temperature Year
1 24 °F 1971
2 29 °F 2012
3 30 °F 2006
3 30 °F 2022
5 31 °F 1928
5 31 °F 1967
7 33 °F 1975
7 33 °F 1990
7 33 °F 2016
10 34 °F 1942
10 34 °F 1992
10 34 °F 2011
10 34 °F 2000
10 34 °F 1998
Lowest High Temperatures in San Luis Obispo on December 20
Rank Temperature Year
1 49 °F 1967
2 52 °F 1970
2 52 °F 1938
4 54 °F 1947
4 54 °F 1968
4 54 °F 2010
4 54 °F 1990
4 54 °F 1952
9 55 °F 1949
9 55 °F 1978
9 55 °F 1951
What's the most it has ever rained in San Luis Obispo on 12/20?
For the date of Dec 20, the most precipitation ever recorded in San Luis Obispo history is 1.52 inches which happened in 1952.
All-Time Most Precipitation in San Luis Obispo on December 20
Rank Precipitation Year
1 1.52 inches 1952
2 1.49 inches 2023
3 0.81 inches 2010
3 0.81 inches 1964
5 0.56 inches 2001
6 0.55 inches 1955
7 0.53 inches 1984
8 0.50 inches 1938
8 0.50 inches 1895
10 0.49 inches 1969
Weather Station Details
Years Station Coordinates
1999–2024 San Luis Obispo Airport location
1893–1998 San Luis Obispo Poly location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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