Seattle April 20 Weather Records

Daily averages and all-time records for weather in Seattle, Washington for the date of April 20.
April 20 All-Time Records
1894–2024
Highest temperature 81 °F 2016
Lowest temperature 30 °F 1961
Lowest daily high 47 °F 2023
Highest daily low 53 °F 2016
Most precipitation 0.57 inches 1917
Most snow none -
April 20 Average Weather
1991–2020 1
Average high 59.4 °F
Average low 43.6 °F
Chance precipitation 50.1%
Chance snow 0%
Seattle April 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 72 45 0.00 n/a
2023 47 37 0.31 0.0
2022 54 38 0.08 0.0
2021 72 48 0.00 0.0
2020 67 45 0.00 0.0
2019 60 47 0.00 0.0
2018 63 43 0.00 0.0
2017 58 44 0.01 0.0
2016 81 53 0.00 0.0
2015 73 46 0.00 0.0
2014 60 42 0.00 0.0
2013 57 47 0.00 0.0
2012 56 44 0.26 0.0
2011 54 36 0.00 0.0
2010 56 47 0.06 0.0
2009 74 47 0.00 0.0
2008 48 34 0.04 n/a
2007 58 36 0.00 n/a
2006 63 44 0.03 n/a
2005 64 41 0.00 n/a
2004 56 44 0.01 n/a
2003 59 46 0.02 n/a
2002 55 42 0.00 n/a
2001 59 43 0.00 n/a
2000 64 47 0.00 n/a
1999 52 42 0.17 n/a
1998 67 40 0.00 n/a
1997 57 43 0.03 n/a
1996 56 38 0.00 0.0
1995 56 43 0.28 0.0
1994 67 46 0.00 0.0
1993 73 51 0.05 0.0
1992 60 45 0.07 0.0
1991 72 44 0.00 0.0
1990 57 49 0.13 0.0
1989 63 45 0.26 0.0
1988 68 48 0.00 0.0
1987 59 36 0.00 0.0
1986 69 48 0.00 0.0
1985 51 36 0.00 0.0
1984 58 42 0.00 0.0
1983 59 47 0.02 0.0
1982 68 38 0.00 0.0
1981 55 45 0.00 0.0
1980 55 44 0.19 0.0
1979 61 41 0.00 0.0
1978 56 40 0.00 0.0
1977 65 37 0.00 0.0
1976 53 40 0.00 0.0
1975 53 36 0.00 0.0
1974 59 46 0.00 0.0
1973 55 38 0.00 0.0
1972 51 44 0.16 0.0
1971 51 44 0.08 0.0
1970 49 39 0.00 0.0
1969 55 40 0.03 0.0
1968 54 36 0.00 0.0
1967 49 42 0.06 0.0
1966 53 40 0.33 0.0
1965 62 49 0.45 0.0
1964 52 41 0.03 0.0
1963 52 38 0.09 0.0
1962 54 41 0.00 0.0
1961 50 30 0.12 0.0
1960 51 38 0.39 0.0
1959 69 40 0.00 0.0
1958 57 46 0.00 0.0
1957 59 37 0.00 0.0
1956 73 45 0.00 0.0
1955 50 39 0.02 0.0
1954 55 36 0.00 0.0
1953 61 46 0.00 0.0
1952 59 33 0.00 0.0
1951 56 35 0.00 0.0
1950 56 35 0.00 0.0
1949 57 43 0.23 0.0
1948 66 39 0.00 0.0
1947 60 45 0.00 0.0
1946 53 44 0.10 0.0
1945 69 47 0.00 0.0
1944 56 42 0.00 0.0
1943 56 45 0.55 0.0
1942 70 50 0.00 0.0
1941 71 44 0.00 0.0
1940 61 47 0.10 0.0
1939 75 44 0.00 0.0
1938 65 42 0.00 0.0
1937 50 40 0.27 0.0
1936 68 46 0.00 0.0
1935 59 45 0.26 0.0
1934 81 52 0.00 0.0
1933 71 46 0.00 0.0
1932 53 39 0.00 0.0
1931 72 43 0.00 0.0
1930 68 51 0.00 0.0
1929 52 45 0.12 0.0
1928 52 40 0.00 0.0
1927 57 33 0.00 0.0
1926 59 46 0.00 0.0
1925 56 40 0.00 0.0
1924 56 41 0.00 0.0
1923 48 39 0.29 0.0
1922 60 44 0.00 0.0
1921 54 40 0.05 0.0
1920 51 36 0.01 0.0
1919 52 43 0.12 0.0
1918 73 48 0.00 0.0
1917 49 42 0.57 0.0
1916 54 41 0.05 0.0
1915 55 42 0.07 0.0
1914 53 39 0.00 0.0
1913 68 43 0.00 0.0
1912 50 42 0.04 0.0
1911 63 39 0.00 0.0
1910 58 47 0.00 0.0
1909 55 42 0.00 0.0
1908 54 42 0.00 0.0
1907 66 43 0.00 0.0
1906 73 49 0.00 0.0
1905 64 49 0.00 0.0
1904 56 48 0.03 0.0
1903 64 41 0.00 0.0
1902 58 43 0.02 0.0
1901 56 42 0.18 0.0
1900 60 46 0.00 0.0
1899 58 46 0.09 0.0
1898 56 45 0.00 0.0
1897 58 46 0.11 0.0
1896 66 37 0.00 0.0
1895 59 43 0.00 0.0
1894 68 45 0.00 0.0
What's the all-time high for Seattle on 4/20?
For the date of Apr 20, the highest temperature ever reached in Seattle history is 81 °F which has happened 2 times, most recently in 2016.
Highest Temperatures in Seattle on April 20
Rank Temperature Year
1 81 °F 1934
1 81 °F 2016
3 75 °F 1939
4 74 °F 2009
5 73 °F 1906
5 73 °F 1956
5 73 °F 1993
5 73 °F 2015
5 73 °F 1918
10 72 °F 1931
10 72 °F 1991
10 72 °F 2021
10 72 °F 2024
What's the all-time low for Seattle on 4/20?
For the date of Apr 20, the lowest temperature ever reached in Seattle history is 30 °F which happened in 1961.
Lowest Temperatures in Seattle on April 20
Rank Temperature Year
1 30 °F 1961
2 33 °F 1952
2 33 °F 1927
4 34 °F 2008
5 35 °F 1950
5 35 °F 1951
7 36 °F 1987
7 36 °F 1985
7 36 °F 2007
7 36 °F 1954
7 36 °F 1968
7 36 °F 2011
7 36 °F 1975
7 36 °F 1920
Lowest High Temperatures in Seattle on April 20
Rank Temperature Year
1 47 °F 2023
2 48 °F 2008
2 48 °F 1923
4 49 °F 1967
4 49 °F 1917
4 49 °F 1970
7 50 °F 1961
7 50 °F 1937
7 50 °F 1955
7 50 °F 1912
What's the most it has ever rained in Seattle on 4/20?
For the date of Apr 20, the most precipitation ever recorded in Seattle history is 0.57 inches which happened in 1917.
All-Time Most Precipitation in Seattle on April 20
Rank Precipitation Year
1 0.57 inches 1917
2 0.55 inches 1943
3 0.45 inches 1965
4 0.39 inches 1960
5 0.33 inches 1966
6 0.31 inches 2023
7 0.29 inches 1923
8 0.28 inches 1995
9 0.27 inches 1937
10 0.26 inches 2012
10 0.26 inches 1935
10 0.26 inches 1989
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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