San Luis Obispo October 21 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of October 21.
October 21 All-Time Records
1893–2024
Highest temperature 99 °F 1929
Lowest temperature 39 °F 1949
Lowest daily high 57 °F 1941
Highest daily low 63 °F 2019
Most precipitation 0.43 inches 1985
October 21 Average Weather
1991–2020 1
Average high 77.6 °F
Average low 49.8 °F
Chance precipitation 12.3%
San Luis Obispo October 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 75 54 0.00 n/a
2022 75 55 0.00 n/a
2021 75 53 0.00 n/a
2020 71 52 0.00 0.0
2019 90 63 0.00 0.0
2018 73 45 0.00 0.0
2017 77 53 0.00 0.0
2016 94 55 0.00 0.0
2015 84 53 0.00 0.0
2014 80 59 0.00 0.0
2013 71 51 0.00 0.0
2012 70 50 0.00 0.0
2011 80 53 0.00 0.0
2010 60 51 0.00 n/a
2009 79 52 0.00 n/a
2008 89 56 0.00 n/a
2007 83 54 0.00 n/a
2006 83 46 0.00 n/a
2005 74 47 0.01 n/a
2004 70 45 0.01 n/a
2003 78 45 0.01 n/a
2002 59 50 0.00 n/a
2001 67 55 0.00 n/a
2000 70 47 0.00 n/a
1999 90 44 0.00 n/a
1998 90 55 0.00 0.0
1997 n/a n/a n/a n/a
1996 71 45 0.00 0.0
1995 71 54 0.00 0.0
1994 74 40 0.00 0.0
1993 86 48 0.00 0.0
1992 86 44 0.10 0.0
1991 92 56 0.00 0.0
1990 n/a n/a n/a n/a
1989 71 54 n/a n/a
1988 74 53 0.00 0.0
1987 71 49 n/a 0.0
1986 70 40 0.00 0.0
1985 60 n/a 0.43 0.0
1984 68 42 0.00 0.0
1983 76 49 0.00 0.0
1982 80 53 0.00 0.0
1981 73 44 0.00 0.0
1980 88 47 0.00 0.0
1979 66 49 0.00 0.0
1978 70 49 0.00 0.0
1977 66 48 0.00 0.0
1976 75 56 0.00 0.0
1975 75 49 0.00 0.0
1974 71 49 0.00 0.0
1973 76 52 0.10 0.0
1972 63 50 0.00 0.0
1971 75 41 0.00 0.0
1970 65 45 0.11 0.0
1969 79 43 0.00 0.0
1968 82 46 0.00 0.0
1967 77 50 0.00 0.0
1966 66 49 0.00 0.0
1965 92 57 0.00 0.0
1964 98 55 0.00 0.0
1963 69 53 0.00 0.0
1962 73 44 0.00 0.0
1961 67 54 0.00 0.0
1960 74 48 0.00 0.0
1959 71 58 0.00 0.0
1958 78 50 0.00 0.0
1957 64 50 0.17 0.0
1956 84 46 0.00 0.0
1955 71 49 0.00 0.0
1954 82 58 0.00 0.0
1953 79 47 0.00 0.0
1952 82 47 0.00 0.0
1951 80 56 0.00 0.0
1950 72 51 0.00 0.0
1949 64 39 0.00 0.0
1948 69 46 0.00 0.0
1947 73 51 0.00 0.0
1946 82 50 0.00 0.0
1945 80 50 0.00 0.0
1944 72 52 0.01 0.0
1943 66 54 0.10 0.0
1942 92 52 0.00 n/a
1941 57 48 0.02 n/a
1940 77 60 n/a n/a
1939 95 61 n/a n/a
1938 87 49 n/a n/a
1937 88 50 n/a n/a
1936 69 50 0.00 n/a
1935 75 44 0.00 n/a
1934 68 45 0.00 n/a
1933 75 47 0.00 n/a
1932 80 53 n/a n/a
1931 71 55 0.00 n/a
1930 78 49 0.00 n/a
1929 99 57 0.00 n/a
1928 73 46 0.00 n/a
1927 78 45 0.00 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 0.00 n/a
1908 n/a n/a 0.00 n/a
1907 n/a n/a 0.13 n/a
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 0.01 n/a
1894 n/a n/a 0.18 n/a
1893 n/a n/a 0.00 n/a
What's the all-time high for San Luis Obispo on 10/21?
For the date of Oct 21, the highest temperature ever reached in San Luis Obispo history is 99 °F which happened in 1929.
Highest Temperatures in San Luis Obispo on October 21
Rank Temperature Year
1 99 °F 1929
2 98 °F 1964
3 95 °F 1939
4 94 °F 2016
5 92 °F 1991
5 92 °F 1942
5 92 °F 1965
8 90 °F 1998
8 90 °F 1999
8 90 °F 2019
What's the all-time low for San Luis Obispo on 10/21?
For the date of Oct 21, the lowest temperature ever reached in San Luis Obispo history is 39 °F which happened in 1949.
Lowest Temperatures in San Luis Obispo on October 21
Rank Temperature Year
1 39 °F 1949
2 40 °F 1994
2 40 °F 1986
4 41 °F 1971
5 42 °F 1984
6 43 °F 1969
7 44 °F 1935
7 44 °F 1999
7 44 °F 1981
7 44 °F 1992
7 44 °F 1962
Lowest High Temperatures in San Luis Obispo on October 21
Rank Temperature Year
1 57 °F 1941
2 59 °F 2002
3 60 °F 1985
3 60 °F 2010
5 63 °F 1972
6 64 °F 1957
6 64 °F 1949
8 65 °F 1970
9 66 °F 1979
9 66 °F 1966
9 66 °F 1977
9 66 °F 1943
What's the most it has ever rained in San Luis Obispo on 10/21?
For the date of Oct 21, the most precipitation ever recorded in San Luis Obispo history is 0.43 inches which happened in 1985.
All-Time Most Precipitation in San Luis Obispo on October 21
Rank Precipitation Year
1 0.43 inches 1985
2 0.18 inches 1894
3 0.17 inches 1957
4 0.13 inches 1907
5 0.11 inches 1970
6 0.10 inches 1973
6 0.10 inches 1992
6 0.10 inches 1943
9 0.02 inches 1941
10 0.01 inches 1944
10 0.01 inches 2005
10 0.01 inches 1895
10 0.01 inches 2004
10 0.01 inches 2003
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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