San Luis Obispo September 17 Weather Records

Daily averages and all-time records for weather in San Luis Obispo, California for the date of September 17.
September 17 All-Time Records
1893–2024
Highest temperature 99 °F 1979
Lowest temperature 43 °F 1986
Lowest daily high 64 °F 1947
Highest daily low 67 °F 1984
Most precipitation 0.39 inches 1989
September 17 Average Weather
1991–2020 1
Average high 80.4 °F
Average low 53.5 °F
Chance precipitation 3.3%
San Luis Obispo September 17 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 79 61 0.00 n/a
2022 72 52 0.00 n/a
2021 68 54 0.00 n/a
2020 86 51 0.00 0.0
2019 85 55 0.00 0.0
2018 76 48 0.00 0.0
2017 76 55 0.00 0.0
2016 88 56 0.00 0.0
2015 83 52 0.00 0.0
2014 82 53 0.00 0.0
2013 79 54 0.00 0.0
2012 72 53 0.00 0.0
2011 75 52 0.00 n/a
2010 79 50 0.00 n/a
2009 84 58 0.00 n/a
2008 72 56 0.00 n/a
2007 77 49 0.00 n/a
2006 95 56 0.00 n/a
2005 75 50 0.00 n/a
2004 74 60 0.00 n/a
2003 76 46 0.00 n/a
2002 77 50 0.00 n/a
2001 72 56 0.00 n/a
2000 94 53 0.00 n/a
1999 72 55 0.00 n/a
1998 83 57 0.00 0.0
1997 89 61 n/a n/a
1996 79 54 0.00 0.0
1995 78 49 0.00 0.0
1994 87 53 0.00 0.0
1993 71 46 0.00 0.0
1992 77 50 0.00 0.0
1991 77 52 0.00 0.0
1990 82 49 0.00 0.0
1989 n/a 51 0.39 0.0
1988 n/a n/a n/a n/a
1987 79 52 0.00 0.0
1986 75 43 0.00 0.0
1985 71 51 0.00 0.0
1984 98 67 0.00 0.0
1983 82 59 0.00 0.0
1982 71 58 0.05 0.0
1981 78 53 0.00 0.0
1980 80 50 0.00 0.0
1979 99 55 0.00 0.0
1978 78 52 0.00 0.0
1977 69 47 0.00 0.0
1976 69 50 0.00 0.0
1975 80 48 0.00 0.0
1974 84 45 0.00 0.0
1973 67 47 0.00 0.0
1972 69 49 0.00 0.0
1971 80 59 0.00 0.0
1970 90 49 0.00 0.0
1969 68 47 0.00 0.0
1968 85 50 0.00 0.0
1967 78 55 0.00 0.0
1966 94 60 0.00 0.0
1965 70 53 0.00 0.0
1964 72 49 0.00 0.0
1963 76 55 0.00 0.0
1962 80 51 0.00 0.0
1961 66 56 0.01 0.0
1960 73 52 0.00 0.0
1959 70 48 0.00 0.0
1958 97 53 0.00 0.0
1957 73 49 0.00 0.0
1956 94 57 0.00 0.0
1955 79 54 0.00 0.0
1954 74 50 0.00 0.0
1953 75 56 0.00 0.0
1952 72 51 0.00 0.0
1951 83 56 0.00 0.0
1950 73 56 0.00 0.0
1949 85 56 0.00 0.0
1948 74 51 0.00 0.0
1947 64 56 0.00 0.0
1946 84 54 0.00 0.0
1945 72 54 0.00 0.0
1944 74 52 0.00 0.0
1943 83 52 0.00 0.0
1942 n/a 52 0.00 n/a
1941 71 51 0.00 n/a
1940 79 58 0.00 n/a
1939 92 59 0.00 n/a
1938 81 56 n/a n/a
1937 75 52 0.00 n/a
1936 75 50 0.00 n/a
1935 97 62 0.00 n/a
1934 81 50 0.00 n/a
1933 69 47 0.00 n/a
1932 70 54 0.00 n/a
1931 76 51 0.00 n/a
1930 73 46 0.00 n/a
1929 89 49 0.00 n/a
1928 80 51 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 0.00 n/a
1893 n/a n/a 0.00 n/a
What's the all-time high for San Luis Obispo on 9/17?
For the date of Sep 17, the highest temperature ever reached in San Luis Obispo history is 99 °F which happened in 1979.
Highest Temperatures in San Luis Obispo on September 17
Rank Temperature Year
1 99 °F 1979
2 98 °F 1984
3 97 °F 1958
3 97 °F 1935
5 95 °F 2006
6 94 °F 1966
6 94 °F 2000
6 94 °F 1956
9 92 °F 1939
10 90 °F 1970
What's the all-time low for San Luis Obispo on 9/17?
For the date of Sep 17, the lowest temperature ever reached in San Luis Obispo history is 43 °F which happened in 1986.
Lowest Temperatures in San Luis Obispo on September 17
Rank Temperature Year
1 43 °F 1986
2 45 °F 1974
3 46 °F 1930
3 46 °F 1993
3 46 °F 2003
6 47 °F 1973
6 47 °F 1933
6 47 °F 1977
6 47 °F 1969
10 48 °F 2018
10 48 °F 1975
10 48 °F 1959
Lowest High Temperatures in San Luis Obispo on September 17
Rank Temperature Year
1 64 °F 1947
2 66 °F 1961
3 67 °F 1973
4 68 °F 2021
4 68 °F 1969
6 69 °F 1972
6 69 °F 1976
6 69 °F 1933
6 69 °F 1977
10 70 °F 1965
10 70 °F 1932
10 70 °F 1959
What's the most it has ever rained in San Luis Obispo on 9/17?
For the date of Sep 17, the most precipitation ever recorded in San Luis Obispo history is 0.39 inches which happened in 1989.
All-Time Most Precipitation in San Luis Obispo on September 17
Rank Precipitation Year
1 0.39 inches 1989
2 0.05 inches 1982
3 0.01 inches 1961
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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