San Luis Obispo August 21 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of August 21.
August 21 All-Time Records
1893–2024
Highest temperature 93 °F 1931
Lowest temperature 46 °F 2002
Lowest daily high 66 °F 1989
Highest daily low 65 °F 2023
Most precipitation 0.01 inches 2000
August 21 Average Weather
1991–2020 1
Average high 80.4 °F
Average low 54.9 °F
Chance precipitation 1.1%
San Luis Obispo August 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 78 65 0.00 n/a
2022 76 56 0.00 n/a
2021 75 60 0.00 n/a
2020 88 55 0.00 0.0
2019 88 54 0.00 0.0
2018 76 59 0.00 0.0
2017 79 61 0.00 0.0
2016 78 58 0.00 0.0
2015 78 63 0.00 0.0
2014 82 55 0.00 0.0
2013 79 53 0.00 0.0
2012 82 54 0.00 0.0
2011 74 57 0.00 n/a
2010 73 53 0.00 n/a
2009 83 59 0.00 n/a
2008 86 58 0.00 n/a
2007 85 54 0.00 n/a
2006 73 58 0.00 n/a
2005 76 55 0.00 n/a
2004 74 57 0.00 n/a
2003 76 56 0.00 n/a
2002 73 46 0.00 n/a
2001 74 52 0.00 n/a
2000 74 48 0.01 n/a
1999 78 51 0.00 n/a
1998 77 53 0.00 0.0
1997 92 61 0.00 0.0
1996 77 50 0.00 0.0
1995 80 55 0.00 0.0
1994 77 53 0.00 0.0
1993 80 51 0.00 0.0
1992 79 51 0.00 0.0
1991 76 50 0.00 0.0
1990 77 50 0.00 0.0
1989 66 52 0.00 0.0
1988 74 52 0.00 0.0
1987 74 47 0.00 0.0
1986 79 53 0.00 0.0
1985 79 52 0.00 0.0
1984 74 57 0.00 0.0
1983 70 59 0.00 0.0
1982 84 54 0.00 0.0
1981 79 56 0.00 0.0
1980 74 53 0.00 0.0
1979 77 51 0.00 0.0
1978 n/a n/a n/a n/a
1977 71 52 0.00 0.0
1976 74 57 0.00 0.0
1975 77 52 0.00 0.0
1974 88 49 0.00 0.0
1973 86 51 0.00 0.0
1972 80 52 0.00 0.0
1971 78 51 0.00 0.0
1970 73 50 0.00 0.0
1969 81 50 0.00 0.0
1968 73 51 0.00 0.0
1967 84 55 0.00 0.0
1966 75 54 0.00 0.0
1965 88 51 0.00 0.0
1964 82 50 0.00 0.0
1963 91 49 0.00 0.0
1962 80 49 0.00 0.0
1961 78 56 0.00 0.0
1960 77 54 0.00 0.0
1959 72 50 0.00 0.0
1958 78 58 0.00 0.0
1957 79 52 0.00 0.0
1956 77 52 0.00 0.0
1955 75 50 0.00 0.0
1954 71 51 0.00 0.0
1953 76 51 0.00 0.0
1952 75 48 0.00 0.0
1951 76 56 0.00 0.0
1950 74 53 0.00 0.0
1949 82 50 0.00 0.0
1948 81 50 0.00 0.0
1947 72 54 0.00 0.0
1946 77 53 0.00 0.0
1945 80 53 0.00 0.0
1944 75 51 0.00 0.0
1943 79 55 0.00 n/a
1942 79 59 0.00 n/a
1941 72 55 0.00 n/a
1940 73 53 0.00 n/a
1939 72 57 0.00 n/a
1938 70 55 0.00 n/a
1937 79 54 0.00 n/a
1936 74 55 0.00 n/a
1935 76 50 0.00 n/a
1934 74 57 0.00 n/a
1933 75 52 0.00 n/a
1932 78 51 0.00 n/a
1931 93 53 0.00 n/a
1930 88 48 0.00 n/a
1929 80 53 0.00 n/a
1928 77 52 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 n/a 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 8/21?
For the date of Aug 21, the highest temperature ever reached in San Luis Obispo history is 93 °F which happened in 1931.
Highest Temperatures in San Luis Obispo on August 21
Rank Temperature Year
1 93 °F 1931
2 92 °F 1997
3 91 °F 1963
4 88 °F 1965
4 88 °F 1930
4 88 °F 1974
4 88 °F 2019
4 88 °F 2020
9 86 °F 2008
9 86 °F 1973
What's the all-time low for San Luis Obispo on 8/21?
For the date of Aug 21, the lowest temperature ever reached in San Luis Obispo history is 46 °F which happened in 2002.
Lowest Temperatures in San Luis Obispo on August 21
Rank Temperature Year
1 46 °F 2002
2 47 °F 1987
3 48 °F 2000
3 48 °F 1952
3 48 °F 1930
6 49 °F 1974
6 49 °F 1962
6 49 °F 1963
9 50 °F 1970
9 50 °F 1964
9 50 °F 1959
9 50 °F 1996
9 50 °F 1990
9 50 °F 1991
9 50 °F 1969
9 50 °F 1948
9 50 °F 1949
9 50 °F 1955
9 50 °F 1935
Lowest High Temperatures in San Luis Obispo on August 21
Rank Temperature Year
1 66 °F 1989
2 70 °F 1983
2 70 °F 1938
4 71 °F 1977
4 71 °F 1954
6 72 °F 1941
6 72 °F 1939
6 72 °F 1947
6 72 °F 1959
10 73 °F 2006
10 73 °F 2010
10 73 °F 1940
10 73 °F 1968
10 73 °F 2002
10 73 °F 1970
What's the most it has ever rained in San Luis Obispo on 8/21?
For the date of Aug 21, the most precipitation ever recorded in San Luis Obispo history is 0.01 inches which happened in 2000.
All-Time Most Precipitation in San Luis Obispo on August 21
Rank Precipitation Year
1 0.01 inches 2000
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.
© H Brothers Inc, 2021–2024
Contact us | Privacy policy