San Luis Obispo May 21 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of May 21.
May 21 All-Time Records
1893–2024
Highest temperature 96 °F 2000
Lowest temperature 36 °F 1974
Lowest daily high 58 °F 1933
Highest daily low 57 °F 1942
Most precipitation 1.58 inches 2006
May 21 Average Weather
1991–2020 1
Average high 72.6 °F
Average low 49.3 °F
Chance precipitation 7.1%
San Luis Obispo May 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 69 53 0.00 n/a
2022 75 45 0.00 n/a
2021 63 43 0.00 n/a
2020 78 50 0.00 0.0
2019 64 50 0.01 0.0
2018 65 53 0.00 0.0
2017 84 50 0.00 0.0
2016 69 45 0.00 0.0
2015 65 51 0.00 0.0
2014 65 53 0.00 0.0
2013 76 47 0.00 0.0
2012 69 50 0.00 0.0
2011 71 48 0.00 n/a
2010 65 47 0.00 n/a
2009 71 49 0.00 n/a
2008 65 48 0.00 n/a
2007 72 48 0.00 n/a
2006 64 56 1.58 n/a
2005 88 56 0.00 n/a
2004 71 52 0.00 n/a
2003 77 49 0.00 n/a
2002 65 51 0.03 n/a
2001 74 53 0.00 n/a
2000 96 49 0.00 n/a
1999 69 39 0.00 n/a
1998 70 47 0.00 0.0
1997 79 52 0.00 0.0
1996 76 49 0.00 0.0
1995 64 50 0.00 0.0
1994 73 46 0.00 0.0
1993 74 52 0.00 0.0
1992 74 50 0.00 0.0
1991 67 47 0.00 0.0
1990 70 50 0.00 0.0
1989 67 43 0.00 0.0
1988 88 49 0.00 0.0
1987 67 50 0.01 0.0
1986 68 48 0.00 0.0
1985 70 45 0.00 0.0
1984 83 45 0.00 0.0
1983 75 48 0.00 0.0
1982 71 47 0.00 0.0
1981 64 43 0.00 0.0
1980 63 49 0.06 0.0
1979 66 55 0.00 0.0
1978 69 51 0.00 0.0
1977 72 48 0.00 0.0
1976 70 41 0.00 0.0
1975 60 42 0.00 0.0
1974 69 36 0.00 0.0
1973 67 49 0.00 0.0
1972 65 45 0.00 0.0
1971 62 44 0.00 0.0
1970 62 42 0.00 0.0
1969 71 49 0.00 0.0
1968 74 50 0.03 0.0
1967 76 48 0.00 0.0
1966 73 50 0.00 0.0
1965 66 50 0.00 0.0
1964 78 49 0.00 0.0
1963 64 52 0.00 0.0
1962 63 43 0.00 0.0
1961 67 51 0.00 0.0
1960 72 47 0.00 0.0
1959 70 45 0.00 0.0
1958 71 49 0.00 0.0
1957 63 52 0.18 0.0
1956 73 48 0.00 0.0
1955 71 47 0.00 0.0
1954 71 46 0.00 0.0
1953 71 46 0.00 0.0
1952 77 45 0.00 0.0
1951 65 50 0.00 0.0
1950 73 48 0.00 0.0
1949 68 48 0.00 0.0
1948 70 41 0.01 0.0
1947 65 50 0.00 0.0
1946 63 50 0.00 0.0
1945 66 43 0.00 0.0
1944 78 50 0.00 0.0
1943 74 45 0.00 n/a
1942 95 57 0.00 n/a
1941 82 54 n/a n/a
1940 71 51 0.00 n/a
1939 65 52 0.00 n/a
1938 65 49 n/a n/a
1937 67 49 0.00 n/a
1936 81 51 0.00 n/a
1935 78 52 0.00 n/a
1934 78 49 0.00 n/a
1933 58 42 0.08 n/a
1932 75 47 0.03 n/a
1931 73 52 0.00 n/a
1930 80 50 0.00 n/a
1929 70 50 0.00 n/a
1928 69 55 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 n/a 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 5/21?
For the date of May 21, the highest temperature ever reached in San Luis Obispo history is 96 °F which happened in 2000.
Highest Temperatures in San Luis Obispo on May 21
Rank Temperature Year
1 96 °F 2000
2 95 °F 1942
3 88 °F 1988
3 88 °F 2005
5 84 °F 2017
6 83 °F 1984
7 82 °F 1941
8 81 °F 1936
9 80 °F 1930
10 79 °F 1997
What's the all-time low for San Luis Obispo on 5/21?
For the date of May 21, the lowest temperature ever reached in San Luis Obispo history is 36 °F which happened in 1974.
Lowest Temperatures in San Luis Obispo on May 21
Rank Temperature Year
1 36 °F 1974
2 39 °F 1999
3 41 °F 1948
3 41 °F 1976
5 42 °F 1970
5 42 °F 1975
5 42 °F 1933
8 43 °F 1989
8 43 °F 1981
8 43 °F 2021
8 43 °F 1962
8 43 °F 1945
Lowest High Temperatures in San Luis Obispo on May 21
Rank Temperature Year
1 58 °F 1933
2 60 °F 1975
3 62 °F 1971
3 62 °F 1970
5 63 °F 1957
5 63 °F 2021
5 63 °F 1946
5 63 °F 1962
5 63 °F 1980
10 64 °F 1981
10 64 °F 2019
10 64 °F 2006
10 64 °F 1963
10 64 °F 1995
What's the most it has ever rained in San Luis Obispo on 5/21?
For the date of May 21, the most precipitation ever recorded in San Luis Obispo history is 1.58 inches which happened in 2006.
All-Time Most Precipitation in San Luis Obispo on May 21
Rank Precipitation Year
1 1.58 inches 2006
2 0.18 inches 1957
3 0.08 inches 1933
4 0.06 inches 1980
5 0.03 inches 2002
5 0.03 inches 1932
5 0.03 inches 1968
8 0.01 inches 1987
8 0.01 inches 2019
8 0.01 inches 1948
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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