San Luis Obispo September 15 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of September 15.
September 15 All-Time Records
1893–2024
Highest temperature 100 °F 1948
Lowest temperature 43 °F 1974
Lowest daily high 66 °F 1975
Highest daily low 65 °F 1958
Most precipitation 0.25 inches 1910
September 15 Average Weather
1991–2020 1
Average high 80.5 °F
Average low 53.7 °F
Chance precipitation 2.9%
San Luis Obispo September 15 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 77 61 0.00 n/a
2022 78 55 0.00 n/a
2021 72 55 0.00 n/a
2020 82 48 0.00 0.0
2019 77 53 0.00 0.0
2018 77 48 0.00 n/a
2017 78 53 0.00 0.0
2016 86 53 0.00 0.0
2015 69 58 0.00 0.0
2014 86 58 0.00 0.0
2013 81 53 0.00 0.0
2012 81 54 0.00 0.0
2011 72 57 0.00 n/a
2010 75 51 0.00 n/a
2009 89 59 0.00 n/a
2008 77 56 0.00 n/a
2007 78 52 0.00 n/a
2006 70 53 0.00 n/a
2005 70 52 0.00 n/a
2004 79 51 0.00 n/a
2003 75 57 0.00 n/a
2002 75 47 0.00 n/a
2001 75 55 0.00 n/a
2000 84 63 0.00 n/a
1999 72 56 0.00 n/a
1998 83 57 0.00 0.0
1997 82 60 n/a n/a
1996 79 52 0.00 0.0
1995 80 52 0.00 0.0
1994 91 46 0.00 0.0
1993 72 50 0.00 0.0
1992 88 53 0.00 0.0
1991 77 53 0.00 0.0
1990 84 n/a 0.00 0.0
1989 n/a 48 0.00 0.0
1988 74 53 n/a n/a
1987 n/a n/a 0.00 0.0
1986 74 46 0.00 0.0
1985 74 55 0.00 0.0
1984 79 58 0.00 0.0
1983 87 57 0.00 0.0
1982 77 59 0.00 0.0
1981 75 53 0.00 0.0
1980 72 48 0.00 0.0
1979 82 53 0.00 0.0
1978 71 54 0.00 0.0
1977 70 48 0.00 0.0
1976 80 55 0.00 0.0
1975 66 47 0.00 0.0
1974 76 43 0.00 0.0
1973 72 53 0.00 0.0
1972 73 52 0.00 0.0
1971 96 59 0.00 0.0
1970 70 44 0.00 0.0
1969 71 52 0.00 0.0
1968 77 49 0.00 0.0
1967 75 56 0.00 0.0
1966 84 56 0.00 0.0
1965 86 52 0.00 0.0
1964 77 44 0.00 0.0
1963 89 53 0.00 0.0
1962 79 51 0.00 0.0
1961 77 49 0.00 0.0
1960 75 52 0.00 0.0
1959 73 55 0.00 0.0
1958 91 65 0.00 0.0
1957 74 54 0.00 0.0
1956 81 53 0.00 0.0
1955 77 51 0.00 0.0
1954 74 50 0.00 0.0
1953 82 56 0.00 0.0
1952 80 43 0.00 0.0
1951 89 55 0.00 0.0
1950 74 51 0.00 0.0
1949 81 51 0.00 0.0
1948 100 56 0.00 0.0
1947 83 49 0.00 0.0
1946 78 50 0.00 0.0
1945 74 55 0.00 0.0
1944 70 49 0.00 0.0
1943 75 49 0.00 0.0
1942 81 48 0.00 n/a
1941 79 52 0.00 n/a
1940 78 61 0.00 n/a
1939 92 56 0.00 n/a
1938 90 57 n/a n/a
1937 90 54 0.00 n/a
1936 89 54 0.00 n/a
1935 90 55 0.00 n/a
1934 91 51 0.00 n/a
1933 72 50 0.00 n/a
1932 70 54 0.00 n/a
1931 76 50 0.00 n/a
1930 73 51 0.00 n/a
1929 80 51 0.00 n/a
1928 83 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 0.25 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 9/15?
For the date of Sep 15, the highest temperature ever reached in San Luis Obispo history is 100 °F which happened in 1948.
Highest Temperatures in San Luis Obispo on September 15
Rank Temperature Year
1 100 °F 1948
2 96 °F 1971
3 92 °F 1939
4 91 °F 1958
4 91 °F 1994
4 91 °F 1934
7 90 °F 1937
7 90 °F 1935
7 90 °F 1938
10 89 °F 1936
10 89 °F 2009
10 89 °F 1963
10 89 °F 1951
What's the all-time low for San Luis Obispo on 9/15?
For the date of Sep 15, the lowest temperature ever reached in San Luis Obispo history is 43 °F which has happened 2 times, most recently in 1974.
Lowest Temperatures in San Luis Obispo on September 15
Rank Temperature Year
1 43 °F 1974
1 43 °F 1952
3 44 °F 1970
3 44 °F 1964
5 46 °F 1994
5 46 °F 1986
7 47 °F 2002
7 47 °F 1975
9 48 °F 1980
9 48 °F 1977
9 48 °F 1942
9 48 °F 2018
9 48 °F 2020
9 48 °F 1989
Lowest High Temperatures in San Luis Obispo on September 15
Rank Temperature Year
1 66 °F 1975
2 69 °F 2015
3 70 °F 1944
3 70 °F 2005
3 70 °F 1970
3 70 °F 1932
3 70 °F 1977
3 70 °F 2006
9 71 °F 1969
9 71 °F 1978
What's the most it has ever rained in San Luis Obispo on 9/15?
For the date of Sep 15, the most precipitation ever recorded in San Luis Obispo history is 0.25 inches which happened in 1910.
All-Time Most Precipitation in San Luis Obispo on September 15
Rank Precipitation Year
1 0.25 inches 1910
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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