San Luis Obispo April 18 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of April 18.
April 18 All-Time Records
1893–2024
Highest temperature 89 °F 1952
Lowest temperature 33 °F 1979
Lowest daily high 54 °F 1971
Highest daily low 69 °F 1938
Most precipitation 2.19 inches 1957
April 18 Average Weather
1991–2020 1
Average high 70.3 °F
Average low 46.4 °F
Chance precipitation 16.0%
San Luis Obispo April 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 72 52 0.00 n/a
2023 63 42 0.00 n/a
2022 65 43 0.00 n/a
2021 80 45 0.00 n/a
2020 62 46 0.00 n/a
2019 77 48 0.00 0.0
2018 65 41 0.00 0.0
2017 65 55 0.42 0.0
2016 88 46 0.00 0.0
2015 71 45 0.00 0.0
2014 71 55 0.00 0.0
2013 78 43 0.00 0.0
2012 76 48 0.00 0.0
2011 63 49 0.00 n/a
2010 70 46 0.00 n/a
2009 80 46 0.00 n/a
2008 68 45 0.00 n/a
2007 63 42 0.00 n/a
2006 73 47 0.00 n/a
2005 65 40 0.00 n/a
2004 64 38 0.00 n/a
2003 62 37 0.01 n/a
2002 61 46 0.00 n/a
2001 63 45 0.00 n/a
2000 63 45 0.21 n/a
1999 77 43 0.00 n/a
1998 73 48 0.00 0.0
1997 75 47 0.00 0.0
1996 71 43 0.90 0.0
1995 60 40 0.03 0.0
1994 74 48 0.00 0.0
1993 68 42 0.15 0.0
1992 73 52 0.00 0.0
1991 64 42 0.00 0.0
1990 70 53 0.00 0.0
1989 65 45 0.00 0.0
1988 n/a n/a n/a n/a
1987 65 44 n/a 0.0
1986 64 n/a 0.00 0.0
1985 65 41 0.01 0.0
1984 65 39 0.00 0.0
1983 72 41 0.70 0.0
1982 73 46 0.00 0.0
1981 62 49 0.09 0.0
1980 68 46 0.00 0.0
1979 60 33 0.00 0.0
1978 66 47 0.00 0.0
1977 80 53 0.00 0.0
1976 65 42 0.00 0.0
1975 58 39 0.00 0.0
1974 62 39 0.00 0.0
1973 64 43 0.00 0.0
1972 63 44 0.00 0.0
1971 54 44 0.04 0.0
1970 63 38 0.00 0.0
1969 65 46 0.00 0.0
1968 65 44 0.00 0.0
1967 58 44 0.53 0.0
1966 60 50 0.00 0.0
1965 65 46 0.00 0.0
1964 58 46 0.00 0.0
1963 57 36 0.00 0.0
1962 80 48 0.00 0.0
1961 68 50 0.00 0.0
1960 78 47 0.00 0.0
1959 59 49 0.00 0.0
1958 70 53 0.00 0.0
1957 59 48 2.19 0.0
1956 68 48 0.00 0.0
1955 61 38 0.12 0.0
1954 76 47 0.00 0.0
1953 65 47 0.00 0.0
1952 89 53 0.00 0.0
1951 63 40 0.00 0.0
1950 87 55 0.00 0.0
1949 65 50 0.00 0.0
1948 75 51 0.00 0.0
1947 74 50 0.00 0.0
1946 63 48 0.00 0.0
1945 64 47 0.00 0.0
1944 63 44 0.00 0.0
1943 72 47 0.00 n/a
1942 58 46 0.00 n/a
1941 64 40 0.07 n/a
1940 80 47 n/a n/a
1939 75 46 0.00 n/a
1938 70 69 n/a n/a
1937 65 44 0.00 n/a
1936 65 52 0.01 n/a
1935 78 50 0.00 n/a
1934 69 49 0.00 n/a
1933 59 33 0.00 n/a
1932 61 47 0.00 n/a
1931 69 47 0.00 n/a
1930 71 48 0.00 n/a
1929 62 47 0.00 n/a
1928 73 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 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 0.00 n/a
1909 n/a n/a n/a 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 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 0.00 n/a
1893 n/a n/a 0.00 n/a
What's the all-time high for San Luis Obispo on 4/18?
For the date of Apr 18, the highest temperature ever reached in San Luis Obispo history is 89 °F which happened in 1952.
Highest Temperatures in San Luis Obispo on April 18
Rank Temperature Year
1 89 °F 1952
2 88 °F 2016
3 87 °F 1950
4 80 °F 2009
4 80 °F 1962
4 80 °F 2021
4 80 °F 1940
4 80 °F 1977
9 78 °F 2013
9 78 °F 1935
9 78 °F 1960
What's the all-time low for San Luis Obispo on 4/18?
For the date of Apr 18, the lowest temperature ever reached in San Luis Obispo history is 33 °F which has happened 2 times, most recently in 1979.
Lowest Temperatures in San Luis Obispo on April 18
Rank Temperature Year
1 33 °F 1933
1 33 °F 1979
3 36 °F 1963
4 37 °F 2003
5 38 °F 1955
5 38 °F 2004
5 38 °F 1970
8 39 °F 1975
8 39 °F 1974
8 39 °F 1984
Lowest High Temperatures in San Luis Obispo on April 18
Rank Temperature Year
1 54 °F 1971
2 57 °F 1963
3 58 °F 1967
3 58 °F 1942
3 58 °F 1964
3 58 °F 1975
7 59 °F 1933
7 59 °F 1959
7 59 °F 1957
10 60 °F 1995
10 60 °F 1966
10 60 °F 1979
What's the most it has ever rained in San Luis Obispo on 4/18?
For the date of Apr 18, the most precipitation ever recorded in San Luis Obispo history is 2.19 inches which happened in 1957.
All-Time Most Precipitation in San Luis Obispo on April 18
Rank Precipitation Year
1 2.19 inches 1957
2 0.90 inches 1996
3 0.70 inches 1983
4 0.53 inches 1967
5 0.42 inches 2017
6 0.21 inches 2000
7 0.15 inches 1993
8 0.12 inches 1955
9 0.09 inches 1981
10 0.07 inches 1941
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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