San Luis Obispo September 30 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of September 30.
September 30 All-Time Records
1893–2024
Highest temperature 107 °F 2020
Lowest temperature 41 °F 1954
Lowest daily high 64 °F 2004
Highest daily low 63 °F 1946
Most precipitation 1.46 inches 1894
September 30 Average Weather
1991–2020 1
Average high 80.3 °F
Average low 52.4 °F
Chance precipitation 6.5%
San Luis Obispo September 30 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 68 60 0.05 n/a
2022 74 56 0.00 n/a
2021 96 50 0.00 n/a
2020 107 53 0.00 0.0
2019 73 43 0.00 0.0
2018 79 48 0.00 0.0
2017 74 52 0.00 0.0
2016 77 52 0.00 0.0
2015 90 62 0.00 0.0
2014 80 55 0.00 0.0
2013 84 51 0.00 0.0
2012 88 54 0.00 0.0
2011 72 53 0.00 n/a
2010 84 55 0.00 n/a
2009 82 57 0.00 n/a
2008 90 52 0.01 n/a
2007 80 48 0.00 n/a
2006 67 55 0.00 n/a
2005 93 51 0.00 n/a
2004 64 48 0.00 n/a
2003 72 51 0.00 n/a
2002 70 44 0.00 n/a
2001 94 59 0.00 n/a
2000 81 n/a 0.01 n/a
1999 98 49 0.00 n/a
1998 68 50 0.00 0.0
1997 91 n/a n/a n/a
1996 84 53 0.00 0.0
1995 80 54 0.00 0.0
1994 79 54 0.00 0.0
1993 82 52 0.00 0.0
1992 83 47 0.00 0.0
1991 82 48 0.00 0.0
1990 78 54 0.00 0.0
1989 n/a 50 0.00 0.0
1988 95 51 n/a n/a
1987 80 n/a 0.00 0.0
1986 82 51 0.00 0.0
1985 65 54 0.00 0.0
1984 93 57 0.00 0.0
1983 70 57 0.10 0.0
1982 71 45 0.00 0.0
1981 75 53 0.00 0.0
1980 97 45 0.00 0.0
1979 82 56 0.20 0.0
1978 96 54 0.00 0.0
1977 72 52 0.00 0.0
1976 74 56 0.33 0.0
1975 72 51 0.00 0.0
1974 80 45 0.00 0.0
1973 78 48 0.00 0.0
1972 81 53 0.00 0.0
1971 74 51 0.19 0.0
1970 92 56 0.00 0.0
1969 82 50 0.00 0.0
1968 68 57 0.00 0.0
1967 67 59 0.00 0.0
1966 70 60 1.08 0.0
1965 84 55 0.00 0.0
1964 71 51 0.00 0.0
1963 83 54 0.00 0.0
1962 83 54 0.00 0.0
1961 70 46 0.00 0.0
1960 69 54 0.00 0.0
1959 76 47 0.00 0.0
1958 78 55 0.00 0.0
1957 77 52 0.00 0.0
1956 89 52 0.00 0.0
1955 69 50 0.00 0.0
1954 69 41 0.00 0.0
1953 79 52 0.00 0.0
1952 82 52 0.00 0.0
1951 78 53 0.00 0.0
1950 77 47 0.00 0.0
1949 88 58 0.00 0.0
1948 72 43 0.00 0.0
1947 72 50 0.00 0.0
1946 82 63 0.00 0.0
1945 85 51 0.00 0.0
1944 66 52 0.00 0.0
1943 76 55 0.00 0.0
1942 69 52 0.00 n/a
1941 82 49 0.00 n/a
1940 82 52 0.00 n/a
1939 74 54 0.00 n/a
1938 76 51 n/a n/a
1937 72 51 0.00 n/a
1936 76 48 0.00 n/a
1935 77 52 0.00 n/a
1934 87 54 0.00 n/a
1933 74 48 0.00 n/a
1932 78 53 0.00 n/a
1931 97 60 0.00 n/a
1930 68 42 0.11 n/a
1929 72 51 0.00 n/a
1928 78 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 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 1.46 n/a
1893 n/a n/a 0.00 n/a
What's the all-time high for San Luis Obispo on 9/30?
For the date of Sep 30, the highest temperature ever reached in San Luis Obispo history is 107 °F which happened in 2020.
Highest Temperatures in San Luis Obispo on September 30
Rank Temperature Year
1 107 °F 2020
2 98 °F 1999
3 97 °F 1931
3 97 °F 1980
5 96 °F 1978
5 96 °F 2021
7 95 °F 1988
8 94 °F 2001
9 93 °F 2005
9 93 °F 1984
What's the all-time low for San Luis Obispo on 9/30?
For the date of Sep 30, the lowest temperature ever reached in San Luis Obispo history is 41 °F which happened in 1954.
Lowest Temperatures in San Luis Obispo on September 30
Rank Temperature Year
1 41 °F 1954
2 42 °F 1930
3 43 °F 2019
3 43 °F 1948
5 44 °F 2002
6 45 °F 1982
6 45 °F 1974
6 45 °F 1980
9 46 °F 1961
10 47 °F 1992
10 47 °F 1959
10 47 °F 1950
Lowest High Temperatures in San Luis Obispo on September 30
Rank Temperature Year
1 64 °F 2004
2 65 °F 1985
3 66 °F 1944
4 67 °F 2006
4 67 °F 1967
6 68 °F 1930
6 68 °F 1998
6 68 °F 1968
6 68 °F 2023
10 69 °F 1954
10 69 °F 1942
10 69 °F 1960
10 69 °F 1955
What's the most it has ever rained in San Luis Obispo on 9/30?
For the date of Sep 30, the most precipitation ever recorded in San Luis Obispo history is 1.46 inches which happened in 1894.
All-Time Most Precipitation in San Luis Obispo on September 30
Rank Precipitation Year
1 1.46 inches 1894
2 1.08 inches 1966
3 0.33 inches 1976
4 0.20 inches 1979
5 0.19 inches 1971
6 0.11 inches 1930
7 0.10 inches 1983
8 0.05 inches 2023
9 0.01 inches 2008
9 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.
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