San Luis Obispo July 21 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of July 21.
July 21 All-Time Records
1893–2024
Highest temperature 95 °F 1967
Lowest temperature 47 °F 1943
Lowest daily high 68 °F 1973
Highest daily low 63 °F 2015
Most precipitation none -
July 21 Average Weather
1991–2020 1
Average high 79.0 °F
Average low 54.7 °F
Chance precipitation 0.9%
San Luis Obispo July 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 80 52 0.00 n/a
2022 77 52 0.00 n/a
2021 78 54 0.00 n/a
2020 77 56 0.00 0.0
2019 77 56 0.00 n/a
2018 82 60 0.00 0.0
2017 80 52 0.00 0.0
2016 88 53 0.00 0.0
2015 78 63 0.00 0.0
2014 79 63 0.00 0.0
2013 81 54 0.00 0.0
2012 81 52 0.00 0.0
2011 75 56 0.00 n/a
2010 72 54 0.00 n/a
2009 83 56 0.00 n/a
2008 74 54 0.00 n/a
2007 79 60 0.00 n/a
2006 86 58 0.00 n/a
2005 76 56 0.00 n/a
2004 80 56 0.00 n/a
2003 82 55 0.00 n/a
2002 72 55 0.00 n/a
2001 76 50 0.00 n/a
2000 77 53 0.00 n/a
1999 72 56 0.00 n/a
1998 79 58 0.00 0.0
1997 78 57 0.00 0.0
1996 94 55 0.00 0.0
1995 74 57 0.00 0.0
1994 71 52 0.00 0.0
1993 73 50 0.00 0.0
1992 74 52 0.00 0.0
1991 74 51 0.00 0.0
1990 79 54 0.00 0.0
1989 82 52 0.00 0.0
1988 81 53 0.00 0.0
1987 70 48 0.00 0.0
1986 75 49 0.00 0.0
1985 75 54 0.00 0.0
1984 n/a n/a 0.00 0.0
1983 90 54 0.00 0.0
1982 75 51 0.00 0.0
1981 81 50 0.00 0.0
1980 76 53 0.00 0.0
1979 81 55 0.00 0.0
1978 73 50 0.00 0.0
1977 82 54 0.00 0.0
1976 80 53 0.00 0.0
1975 75 53 0.00 0.0
1974 86 52 0.00 0.0
1973 68 51 0.00 0.0
1972 70 50 0.00 0.0
1971 78 53 0.00 0.0
1970 83 54 0.00 0.0
1969 83 55 0.00 0.0
1968 81 53 0.00 0.0
1967 95 55 0.00 0.0
1966 71 50 0.00 0.0
1965 79 54 0.00 0.0
1964 78 49 0.00 0.0
1963 75 49 0.00 0.0
1962 75 51 0.00 0.0
1961 84 54 0.00 0.0
1960 95 52 0.00 0.0
1959 78 57 0.00 0.0
1958 75 54 0.00 0.0
1957 75 56 0.00 0.0
1956 75 53 0.00 0.0
1955 73 52 0.00 0.0
1954 76 48 0.00 0.0
1953 78 53 0.00 0.0
1952 73 53 0.00 0.0
1951 79 53 0.00 0.0
1950 76 53 0.00 0.0
1949 76 50 0.00 0.0
1948 72 53 0.00 0.0
1947 76 51 0.00 0.0
1946 75 56 0.00 0.0
1945 83 55 0.00 0.0
1944 78 53 0.00 0.0
1943 70 47 0.00 n/a
1942 75 54 0.00 n/a
1941 83 54 0.00 n/a
1940 79 50 0.00 n/a
1939 80 49 0.00 n/a
1938 79 56 0.00 n/a
1937 77 55 0.00 n/a
1936 85 58 0.00 n/a
1935 72 53 0.00 n/a
1934 75 56 0.00 n/a
1933 75 50 0.00 n/a
1932 73 52 0.00 n/a
1931 94 56 0.00 n/a
1930 74 50 0.00 n/a
1929 77 48 0.00 n/a
1928 74 53 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 7/21?
For the date of Jul 21, the highest temperature ever reached in San Luis Obispo history is 95 °F which has happened 2 times, most recently in 1967.
Highest Temperatures in San Luis Obispo on July 21
Rank Temperature Year
1 95 °F 1967
1 95 °F 1960
3 94 °F 1931
3 94 °F 1996
5 90 °F 1983
6 88 °F 2016
7 86 °F 1974
7 86 °F 2006
9 85 °F 1936
10 84 °F 1961
What's the all-time low for San Luis Obispo on 7/21?
For the date of Jul 21, the lowest temperature ever reached in San Luis Obispo history is 47 °F which happened in 1943.
Lowest Temperatures in San Luis Obispo on July 21
Rank Temperature Year
1 47 °F 1943
2 48 °F 1987
2 48 °F 1929
2 48 °F 1954
5 49 °F 1963
5 49 °F 1939
5 49 °F 1964
5 49 °F 1986
9 50 °F 2001
9 50 °F 1993
9 50 °F 1930
9 50 °F 1949
9 50 °F 1933
9 50 °F 1972
9 50 °F 1940
9 50 °F 1978
9 50 °F 1981
9 50 °F 1966
Lowest High Temperatures in San Luis Obispo on July 21
Rank Temperature Year
1 68 °F 1973
2 70 °F 1943
2 70 °F 1972
2 70 °F 1987
5 71 °F 1994
5 71 °F 1966
7 72 °F 1948
7 72 °F 1935
7 72 °F 1999
7 72 °F 2002
7 72 °F 2010
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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