Seattle August 20 Weather Records

Daily averages and all-time records for weather in Seattle, Washington for the date of August 20.
August 20 All-Time Records
1894–2024
Highest temperature 91 °F 2016
Lowest temperature 47 °F 1952
Lowest daily high 60 °F 1899
Highest daily low 65 °F 1915
Most precipitation 0.70 inches 2008
Most snow none -
August 20 Average Weather
1991–2020 1
Average high 76.2 °F
Average low 56.5 °F
Chance precipitation 16.7%
Chance snow 0%
Seattle August 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 80 58 0.00 0.0
2022 77 62 0.00 0.0
2021 66 57 0.00 0.0
2020 80 62 0.08 0.0
2019 82 56 0.00 0.0
2018 81 57 0.00 0.0
2017 77 56 0.00 0.0
2016 91 62 0.00 0.0
2015 73 58 0.08 0.0
2014 71 57 0.00 0.0
2013 78 61 0.00 0.0
2012 78 59 0.00 0.0
2011 85 59 0.00 0.0
2010 69 52 0.00 0.0
2009 78 60 0.00 0.0
2008 66 57 0.70 n/a
2007 66 57 0.16 n/a
2006 86 56 0.00 n/a
2005 80 54 0.00 n/a
2004 79 59 0.00 n/a
2003 79 53 0.00 n/a
2002 67 55 0.00 n/a
2001 71 51 0.00 n/a
2000 73 54 0.00 n/a
1999 76 55 0.00 n/a
1998 81 54 0.00 n/a
1997 64 57 0.11 n/a
1996 71 57 0.00 0.0
1995 79 52 0.00 0.0
1994 74 60 0.00 0.0
1993 74 57 0.00 0.0
1992 75 53 0.00 0.0
1991 84 56 0.00 0.0
1990 77 55 0.00 0.0
1989 74 60 0.04 0.0
1988 68 50 0.00 0.0
1987 70 55 0.00 0.0
1986 83 55 0.00 0.0
1985 68 53 0.00 0.0
1984 78 53 0.00 0.0
1983 74 53 0.00 0.0
1982 84 60 0.06 0.0
1981 72 58 0.00 0.0
1980 68 53 0.00 0.0
1979 74 56 0.00 0.0
1978 66 54 0.03 0.0
1977 79 54 0.00 0.0
1976 72 58 0.00 0.0
1975 70 55 0.00 0.0
1974 64 53 0.00 0.0
1973 71 49 0.00 0.0
1972 74 57 0.00 0.0
1971 77 62 0.01 0.0
1970 74 56 0.00 0.0
1969 74 61 0.00 0.0
1968 69 53 0.00 0.0
1967 86 60 0.02 0.0
1966 87 54 0.00 0.0
1965 73 60 0.01 0.0
1964 72 53 0.00 0.0
1963 71 55 0.00 0.0
1962 74 57 0.00 0.0
1961 82 55 0.00 0.0
1960 71 53 0.00 0.0
1959 75 50 0.00 0.0
1958 84 53 0.00 0.0
1957 72 54 0.00 0.0
1956 80 54 0.00 0.0
1955 71 54 0.04 0.0
1954 67 57 0.00 0.0
1953 71 53 0.00 0.0
1952 73 47 0.00 0.0
1951 83 55 0.00 0.0
1950 86 55 0.00 0.0
1949 73 52 0.00 0.0
1948 64 52 0.01 0.0
1947 69 52 0.00 0.0
1946 84 59 0.00 0.0
1945 81 51 0.00 0.0
1944 77 53 0.00 0.0
1943 70 56 0.03 0.0
1942 76 62 0.00 0.0
1941 79 58 0.00 0.0
1940 68 60 0.00 0.0
1939 86 61 0.00 0.0
1938 78 54 0.00 0.0
1937 73 53 0.00 0.0
1936 82 56 0.00 0.0
1935 78 51 0.00 0.0
1934 78 57 0.00 0.0
1933 73 55 0.00 0.0
1932 68 57 0.10 0.0
1931 78 55 0.00 0.0
1930 66 54 0.00 0.0
1929 70 52 0.00 0.0
1928 72 54 0.00 0.0
1927 63 57 0.00 0.0
1926 70 57 0.00 0.0
1925 67 56 0.00 0.0
1924 65 55 0.00 0.0
1923 74 57 0.43 0.0
1922 65 57 0.00 0.0
1921 70 53 0.05 0.0
1920 80 57 0.00 0.0
1919 79 55 0.00 0.0
1918 70 48 0.00 0.0
1917 72 59 0.01 0.0
1916 71 52 0.00 0.0
1915 87 65 0.00 0.0
1914 67 56 0.00 0.0
1913 72 53 0.00 0.0
1912 75 57 0.00 0.0
1911 61 53 0.04 0.0
1910 61 54 0.00 0.0
1909 64 55 0.00 0.0
1908 77 58 0.00 0.0
1907 77 54 0.00 0.0
1906 71 51 0.00 0.0
1905 73 55 0.00 0.0
1904 69 49 0.00 0.0
1903 73 60 0.00 0.0
1902 82 56 0.00 0.0
1901 64 53 0.00 0.0
1900 79 56 0.00 0.0
1899 60 52 0.08 0.0
1898 65 57 0.00 0.0
1897 82 62 0.00 0.0
1896 76 53 0.00 0.0
1895 68 52 0.00 0.0
1894 85 57 0.00 0.0
What's the all-time high for Seattle on 8/20?
For the date of Aug 20, the highest temperature ever reached in Seattle history is 91 °F which happened in 2016.
Highest Temperatures in Seattle on August 20
Rank Temperature Year
1 91 °F 2016
2 87 °F 1966
2 87 °F 1915
4 86 °F 2006
4 86 °F 1950
4 86 °F 1967
4 86 °F 1939
8 85 °F 2011
8 85 °F 1894
10 84 °F 1958
10 84 °F 1946
10 84 °F 1982
10 84 °F 1991
What's the all-time low for Seattle on 8/20?
For the date of Aug 20, the lowest temperature ever reached in Seattle history is 47 °F which happened in 1952.
Lowest Temperatures in Seattle on August 20
Rank Temperature Year
1 47 °F 1952
2 48 °F 1918
3 49 °F 1904
3 49 °F 1973
5 50 °F 1959
5 50 °F 1988
7 51 °F 2001
7 51 °F 1906
7 51 °F 1945
7 51 °F 1935
Lowest High Temperatures in Seattle on August 20
Rank Temperature Year
1 60 °F 1899
2 61 °F 1910
2 61 °F 1911
4 63 °F 1927
5 64 °F 1948
5 64 °F 1997
5 64 °F 1901
5 64 °F 1909
5 64 °F 1974
10 65 °F 1898
10 65 °F 1924
10 65 °F 1922
What's the most it has ever rained in Seattle on 8/20?
For the date of Aug 20, the most precipitation ever recorded in Seattle history is 0.70 inches which happened in 2008.
All-Time Most Precipitation in Seattle on August 20
Rank Precipitation Year
1 0.70 inches 2008
2 0.43 inches 1923
3 0.16 inches 2007
4 0.11 inches 1997
5 0.10 inches 1932
6 0.08 inches 1899
6 0.08 inches 2020
6 0.08 inches 2015
9 0.06 inches 1982
10 0.05 inches 1921
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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