San Luis Obispo March 18 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of March 18.
March 18 All-Time Records
1893–2024
Highest temperature 85 °F 1978
Lowest temperature 28 °F 1986
Lowest daily high 53 °F 1963
Highest daily low 57 °F 2009
Most precipitation 1.64 inches 1991
March 18 Average Weather
1991–2020 1
Average high 67.5 °F
Average low 45.1 °F
Chance precipitation 26.8%
San Luis Obispo March 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 82 46 0.00 n/a
2023 71 43 0.00 n/a
2022 75 40 0.00 n/a
2021 65 43 0.00 n/a
2020 59 34 0.00 0.0
2019 73 43 0.00 n/a
2018 64 37 0.00 0.0
2017 75 50 0.00 0.0
2016 68 53 0.00 0.0
2015 74 50 0.00 0.0
2014 77 49 0.00 0.0
2013 68 42 0.00 0.0
2012 54 41 0.15 n/a
2011 61 36 0.27 n/a
2010 76 48 0.00 n/a
2009 83 57 0.00 n/a
2008 64 39 0.00 n/a
2007 66 50 0.00 n/a
2006 58 37 0.01 n/a
2005 55 47 0.20 n/a
2004 69 50 0.00 n/a
2003 63 39 0.00 n/a
2002 62 37 0.00 n/a
2001 81 47 0.00 n/a
2000 80 48 0.00 n/a
1999 54 45 0.00 n/a
1998 65 51 0.00 0.0
1997 72 n/a 0.00 0.0
1996 76 49 0.00 0.0
1995 75 50 0.00 0.0
1994 74 45 0.00 0.0
1993 65 47 0.13 0.0
1992 66 43 0.00 0.0
1991 55 44 1.64 0.0
1990 72 45 0.00 0.0
1989 62 46 0.00 0.0
1988 76 43 0.00 0.0
1987 70 46 0.00 0.0
1986 56 28 0.00 0.0
1985 63 38 0.46 0.0
1984 65 n/a 0.00 0.0
1983 62 45 0.45 0.0
1982 54 43 1.01 0.0
1981 75 39 0.00 0.0
1980 70 47 n/a 0.0
1979 58 42 0.00 0.0
1978 85 50 0.00 0.0
1977 58 n/a 0.00 0.0
1976 74 47 0.00 0.0
1975 61 41 0.00 0.0
1974 69 45 0.00 0.0
1973 60 38 0.00 0.0
1972 68 46 0.00 0.0
1971 70 45 0.00 0.0
1970 68 42 0.00 0.0
1969 67 45 0.00 0.0
1968 57 38 0.04 0.0
1967 61 43 0.00 0.0
1966 67 43 0.00 0.0
1965 62 45 0.00 0.0
1964 81 43 0.00 0.0
1963 53 36 0.00 0.0
1962 62 45 0.00 0.0
1961 63 45 0.00 0.0
1960 76 49 0.00 0.0
1959 70 47 0.00 0.0
1958 60 46 0.00 0.0
1957 58 38 0.01 0.0
1956 68 43 0.00 0.0
1955 61 36 0.00 0.0
1954 55 40 0.03 0.0
1953 67 44 0.00 0.0
1952 55 42 0.06 0.0
1951 75 47 0.00 0.0
1950 69 48 0.00 0.0
1949 64 41 0.00 0.0
1948 58 40 0.03 0.0
1947 59 47 0.00 0.0
1946 54 47 0.00 0.0
1945 58 42 0.00 0.0
1944 71 41 0.00 0.0
1943 59 43 0.50 n/a
1942 70 43 0.00 n/a
1941 68 51 n/a n/a
1940 65 53 n/a n/a
1939 62 45 n/a n/a
1938 64 42 0.00 n/a
1937 57 36 0.33 n/a
1936 67 49 0.00 n/a
1935 58 40 0.00 n/a
1934 61 47 0.03 n/a
1933 72 46 0.00 n/a
1932 75 52 0.00 n/a
1931 65 51 0.00 n/a
1930 59 42 0.00 n/a
1929 57 45 0.01 n/a
1928 75 47 0.00 n/a
1927 n/a n/a n/a 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 n/a n/a
1915 n/a n/a n/a n/a
1914 n/a n/a n/a n/a
1913 n/a n/a 0.24 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 0.00 n/a
1908 n/a n/a 0.00 n/a
1907 n/a n/a 0.00 0.0
1906 n/a n/a n/a n/a
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 0.42 n/a
1894 n/a n/a 0.00 n/a
1893 n/a n/a 0.00 n/a
What's the all-time high for San Luis Obispo on 3/18?
For the date of Mar 18, the highest temperature ever reached in San Luis Obispo history is 85 °F which happened in 1978.
Highest Temperatures in San Luis Obispo on March 18
Rank Temperature Year
1 85 °F 1978
2 83 °F 2009
3 82 °F 2024
4 81 °F 2001
4 81 °F 1964
6 80 °F 2000
7 77 °F 2014
8 76 °F 2010
8 76 °F 1996
8 76 °F 1988
8 76 °F 1960
What's the all-time low for San Luis Obispo on 3/18?
For the date of Mar 18, the lowest temperature ever reached in San Luis Obispo history is 28 °F which happened in 1986.
Lowest Temperatures in San Luis Obispo on March 18
Rank Temperature Year
1 28 °F 1986
2 34 °F 2020
3 36 °F 2011
3 36 °F 1955
3 36 °F 1963
3 36 °F 1937
7 37 °F 2006
7 37 °F 2018
7 37 °F 2002
10 38 °F 1973
10 38 °F 1985
10 38 °F 1957
10 38 °F 1968
Lowest High Temperatures in San Luis Obispo on March 18
Rank Temperature Year
1 53 °F 1963
2 54 °F 1999
2 54 °F 2012
2 54 °F 1946
2 54 °F 1982
6 55 °F 1952
6 55 °F 1954
6 55 °F 2005
6 55 °F 1991
10 56 °F 1986
What's the most it has ever rained in San Luis Obispo on 3/18?
For the date of Mar 18, the most precipitation ever recorded in San Luis Obispo history is 1.64 inches which happened in 1991.
All-Time Most Precipitation in San Luis Obispo on March 18
Rank Precipitation Year
1 1.64 inches 1991
2 1.01 inches 1982
3 0.50 inches 1943
4 0.46 inches 1985
5 0.45 inches 1983
6 0.42 inches 1895
7 0.33 inches 1937
8 0.27 inches 2011
9 0.24 inches 1913
10 0.20 inches 2005
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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