Seattle September 15 Weather Records

Daily averages and all-time records for weather in Seattle, Washington for the date of September 15.
September 15 All-Time Records
1894–2024
Highest temperature 93 °F 1967
Lowest temperature 42 °F 1952
Lowest daily high 57 °F 1956
Highest daily low 61 °F 2020
Most precipitation 0.82 inches 1896
Most snow none -
September 15 Average Weather
1991–2020 1
Average high 70.9 °F
Average low 53.2 °F
Chance precipitation 27.7%
Chance snow 0%
Seattle September 15 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 84 54 0.00 0.0
2022 69 57 0.00 0.0
2021 65 53 0.13 0.0
2020 75 61 0.01 0.0
2019 61 56 0.44 0.0
2018 63 53 0.01 0.0
2017 76 50 0.00 0.0
2016 72 52 0.00 0.0
2015 64 50 0.00 0.0
2014 87 54 0.00 0.0
2013 66 58 0.13 0.0
2012 72 52 0.00 0.0
2011 65 54 0.00 0.0
2010 67 54 0.14 0.0
2009 78 59 0.00 0.0
2008 79 54 0.00 n/a
2007 67 55 0.00 n/a
2006 63 49 0.06 n/a
2005 65 53 0.01 n/a
2004 62 53 0.03 n/a
2003 64 47 0.00 n/a
2002 65 56 0.00 n/a
2001 76 51 0.00 n/a
2000 73 59 0.00 n/a
1999 58 52 0.00 n/a
1998 77 53 0.00 n/a
1997 62 54 0.48 n/a
1996 63 52 0.21 0.0
1995 83 56 0.00 0.0
1994 77 60 0.00 0.0
1993 68 51 0.00 0.0
1992 64 48 0.00 0.0
1991 75 50 0.00 0.0
1990 64 53 0.00 0.0
1989 76 51 0.00 0.0
1988 61 50 0.00 0.0
1987 64 49 0.08 0.0
1986 67 48 0.00 0.0
1985 64 52 0.00 0.0
1984 71 59 0.00 0.0
1983 65 51 0.00 0.0
1982 70 50 0.00 0.0
1981 89 53 0.00 0.0
1980 75 55 0.00 0.0
1979 71 56 0.00 0.0
1978 68 52 0.00 0.0
1977 66 53 0.02 0.0
1976 65 51 0.00 0.0
1975 63 53 0.00 0.0
1974 76 51 0.00 0.0
1973 76 54 0.00 0.0
1972 71 49 0.00 0.0
1971 64 47 0.00 0.0
1970 68 45 0.00 0.0
1969 67 43 0.00 0.0
1968 66 54 0.00 0.0
1967 93 57 0.00 0.0
1966 66 52 0.00 0.0
1965 60 48 0.23 0.0
1964 71 53 0.00 0.0
1963 61 53 0.06 0.0
1962 68 45 0.00 0.0
1961 69 53 0.01 0.0
1960 64 52 0.00 0.0
1959 62 51 0.69 0.0
1958 71 56 0.05 0.0
1957 69 53 0.00 0.0
1956 57 51 0.00 0.0
1955 57 49 0.13 0.0
1954 64 53 0.08 0.0
1953 75 48 0.00 0.0
1952 73 42 0.00 0.0
1951 87 47 0.00 0.0
1950 61 45 0.00 0.0
1949 60 51 0.35 0.0
1948 64 49 0.47 0.0
1947 66 52 0.00 0.0
1946 64 53 0.15 0.0
1945 65 54 0.67 0.0
1944 59 52 0.20 0.0
1943 84 57 0.00 0.0
1942 68 59 0.00 0.0
1941 65 51 0.00 0.0
1940 73 55 0.00 0.0
1939 70 55 0.01 0.0
1938 64 53 0.00 0.0
1937 75 59 0.00 0.0
1936 64 49 0.00 0.0
1935 65 57 0.17 0.0
1934 72 51 0.00 0.0
1933 63 55 0.01 0.0
1932 73 54 0.00 0.0
1931 63 54 0.00 0.0
1930 70 57 0.00 0.0
1929 74 53 0.00 0.0
1928 64 46 0.00 0.0
1927 67 48 0.00 0.0
1926 59 51 0.05 0.0
1925 60 54 0.00 0.0
1924 68 50 0.00 0.0
1923 68 51 0.00 0.0
1922 71 52 0.00 0.0
1921 69 45 0.00 0.0
1920 66 53 0.00 0.0
1919 78 56 0.00 0.0
1918 78 54 0.00 0.0
1917 75 56 0.00 0.0
1916 78 50 0.00 0.0
1915 68 56 0.00 0.0
1914 57 48 0.09 0.0
1913 68 53 0.00 0.0
1912 80 59 0.00 0.0
1911 57 50 0.30 0.0
1910 71 50 0.00 0.0
1909 72 51 0.00 0.0
1908 59 51 0.00 0.0
1907 58 54 0.28 0.0
1906 66 47 0.00 0.0
1905 64 51 0.00 0.0
1904 72 51 0.00 0.0
1903 69 48 0.00 0.0
1902 60 53 0.00 0.0
1901 66 45 0.00 0.0
1900 59 52 0.20 0.0
1899 71 51 0.00 0.0
1898 73 54 0.00 0.0
1897 64 45 0.00 0.0
1896 58 50 0.82 0.0
1895 63 45 0.00 0.0
1894 57 55 0.17 0.0
What's the all-time high for Seattle on 9/15?
For the date of Sep 15, the highest temperature ever reached in Seattle history is 93 °F which happened in 1967.
Highest Temperatures in Seattle on September 15
Rank Temperature Year
1 93 °F 1967
2 89 °F 1981
3 87 °F 2014
3 87 °F 1951
5 84 °F 1943
5 84 °F 2023
7 83 °F 1995
8 80 °F 1912
9 79 °F 2008
10 78 °F 1916
10 78 °F 1918
10 78 °F 1919
10 78 °F 2009
What's the all-time low for Seattle on 9/15?
For the date of Sep 15, the lowest temperature ever reached in Seattle history is 42 °F which happened in 1952.
Lowest Temperatures in Seattle on September 15
Rank Temperature Year
1 42 °F 1952
2 43 °F 1969
3 45 °F 1962
3 45 °F 1897
3 45 °F 1901
3 45 °F 1895
3 45 °F 1970
3 45 °F 1950
3 45 °F 1921
10 46 °F 1928
Lowest High Temperatures in Seattle on September 15
Rank Temperature Year
1 57 °F 1894
1 57 °F 1914
1 57 °F 1956
1 57 °F 1911
1 57 °F 1955
6 58 °F 1999
6 58 °F 1896
6 58 °F 1907
9 59 °F 1908
9 59 °F 1926
9 59 °F 1900
9 59 °F 1944
What's the most it has ever rained in Seattle on 9/15?
For the date of Sep 15, the most precipitation ever recorded in Seattle history is 0.82 inches which happened in 1896.
All-Time Most Precipitation in Seattle on September 15
Rank Precipitation Year
1 0.82 inches 1896
2 0.69 inches 1959
3 0.67 inches 1945
4 0.48 inches 1997
5 0.47 inches 1948
6 0.44 inches 2019
7 0.35 inches 1949
8 0.30 inches 1911
9 0.28 inches 1907
10 0.23 inches 1965
Weather Station Details
Years Station Coordinates
1948–2024 Seattle Tacoma International Airport location
1894–1947 University of Washington location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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