San Luis Obispo December 18 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of December 18.
December 18 All-Time Records
1893–2024
Highest temperature 82 °F 1998
Lowest temperature 24 °F 1971
Lowest daily high 50 °F 1948
Highest daily low 57 °F 1929
Most precipitation 3.15 inches 2010
December 18 Average Weather
1991–2020 1
Average high 65.0 °F
Average low 41.0 °F
Chance precipitation 27.3%
San Luis Obispo December 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 65 52 0.61 n/a
2022 65 32 0.00 n/a
2021 65 34 0.00 n/a
2020 69 40 0.00 n/a
2019 59 42 0.15 n/a
2018 66 45 0.00 0.0
2017 73 36 0.00 n/a
2016 62 34 0.00 0.0
2015 65 36 0.00 0.0
2014 61 49 0.00 n/a
2013 62 50 0.00 0.0
2012 57 42 0.00 n/a
2011 60 35 0.00 0.0
2010 59 55 3.15 n/a
2009 68 53 0.00 n/a
2008 59 32 0.00 n/a
2007 57 52 2.40 n/a
2006 60 35 0.00 n/a
2005 58 51 0.19 n/a
2004 75 37 0.00 n/a
2003 72 35 0.00 n/a
2002 57 35 0.01 n/a
2001 64 38 0.00 n/a
2000 79 42 0.00 n/a
1999 73 49 0.00 n/a
1998 82 41 0.00 0.0
1997 68 48 0.00 0.0
1996 70 42 0.00 0.0
1995 60 40 0.09 0.0
1994 70 39 0.00 0.0
1993 64 39 0.00 0.0
1992 57 38 0.25 0.0
1991 68 39 0.06 0.0
1990 59 33 0.00 0.0
1989 63 35 0.00 0.0
1988 58 43 0.06 n/a
1987 60 44 0.00 0.0
1986 72 42 0.00 0.0
1985 77 44 0.00 0.0
1984 57 n/a 0.20 0.0
1983 65 52 0.00 0.0
1982 65 37 0.00 0.0
1981 75 44 0.00 0.0
1980 79 53 0.00 0.0
1979 79 41 0.00 0.0
1978 54 46 0.78 0.0
1977 58 45 1.95 0.0
1976 75 41 0.00 0.0
1975 70 34 0.00 0.0
1974 59 38 0.00 0.0
1973 65 41 0.00 0.0
1972 63 52 0.00 0.0
1971 62 24 0.00 0.0
1970 53 37 0.19 0.0
1969 64 43 0.00 0.0
1968 56 40 0.00 0.0
1967 54 38 1.02 0.0
1966 70 42 0.00 0.0
1965 57 31 0.00 0.0
1964 59 42 0.00 0.0
1963 67 35 0.00 0.0
1962 62 51 0.00 0.0
1961 59 44 0.00 0.0
1960 68 39 0.00 0.0
1959 65 46 0.00 0.0
1958 81 40 0.00 0.0
1957 67 46 0.09 0.0
1956 75 42 0.00 0.0
1955 60 43 0.00 0.0
1954 63 n/a 0.00 0.0
1953 60 44 0.00 0.0
1952 60 42 0.00 0.0
1951 58 39 0.00 0.0
1950 69 48 0.00 0.0
1949 52 45 0.45 0.0
1948 50 35 0.05 0.0
1947 61 44 0.16 0.0
1946 64 38 0.00 0.0
1945 61 47 0.00 0.0
1944 69 42 0.00 0.0
1943 73 55 0.00 0.0
1942 62 44 0.00 n/a
1941 66 48 0.00 n/a
1940 63 54 0.49 n/a
1939 67 55 0.00 n/a
1938 63 50 0.02 n/a
1937 73 54 0.00 n/a
1936 65 50 n/a n/a
1935 75 30 0.00 n/a
1934 66 47 0.00 n/a
1933 61 37 0.00 n/a
1932 57 45 0.00 n/a
1931 69 42 0.00 n/a
1930 62 38 0.00 n/a
1929 68 57 0.00 n/a
1928 60 n/a 0.00 n/a
1927 65 36 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 0.08 n/a
1914 n/a n/a 0.50 n/a
1913 n/a n/a n/a 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 1.00 n/a
1909 n/a n/a 0.00 n/a
1908 n/a n/a 0.00 n/a
1907 n/a n/a 0.00 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 0.00 n/a
1894 n/a n/a 0.03 n/a
1893 n/a n/a 0.02 n/a
What's the all-time high for San Luis Obispo on 12/18?
For the date of Dec 18, the highest temperature ever reached in San Luis Obispo history is 82 °F which happened in 1998.
Highest Temperatures in San Luis Obispo on December 18
Rank Temperature Year
1 82 °F 1998
2 81 °F 1958
3 79 °F 1980
3 79 °F 2000
3 79 °F 1979
6 77 °F 1985
7 75 °F 2004
7 75 °F 1976
7 75 °F 1935
7 75 °F 1981
7 75 °F 1956
What's the all-time low for San Luis Obispo on 12/18?
For the date of Dec 18, 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 18
Rank Temperature Year
1 24 °F 1971
2 30 °F 1935
3 31 °F 1965
4 32 °F 2022
4 32 °F 2008
6 33 °F 1990
7 34 °F 1975
7 34 °F 2016
7 34 °F 2021
10 35 °F 1948
10 35 °F 1989
10 35 °F 2002
10 35 °F 2011
10 35 °F 1963
10 35 °F 2006
10 35 °F 2003
Lowest High Temperatures in San Luis Obispo on December 18
Rank Temperature Year
1 50 °F 1948
2 52 °F 1949
3 53 °F 1970
4 54 °F 1978
4 54 °F 1967
6 56 °F 1968
7 57 °F 1932
7 57 °F 1965
7 57 °F 1984
7 57 °F 2012
7 57 °F 2007
7 57 °F 1992
7 57 °F 2002
What's the most it has ever rained in San Luis Obispo on 12/18?
For the date of Dec 18, the most precipitation ever recorded in San Luis Obispo history is 3.15 inches which happened in 2010.
All-Time Most Precipitation in San Luis Obispo on December 18
Rank Precipitation Year
1 3.15 inches 2010
2 2.40 inches 2007
3 1.95 inches 1977
4 1.02 inches 1967
5 1.00 inches 1910
6 0.78 inches 1978
7 0.61 inches 2023
8 0.50 inches 1914
9 0.49 inches 1940
10 0.45 inches 1949
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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