Seattle April 21 Weather Records

Daily averages and all-time records for weather in Seattle, Washington for the date of April 21.
April 21 All-Time Records
1894–2024
Highest temperature 76 °F 1982
Lowest temperature 29 °F 1951
Lowest daily high 48 °F 1925
Highest daily low 54 °F 1934
Most precipitation 0.87 inches 2010
Most snow none -
April 21 Average Weather
1991–2020 1
Average high 59.6 °F
Average low 43.8 °F
Chance precipitation 50.0%
Chance snow 0%
Seattle April 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 58 42 0.03 n/a
2023 52 43 0.00 0.0
2022 56 42 0.18 0.0
2021 73 48 0.00 0.0
2020 58 47 0.00 0.0
2019 60 45 0.00 0.0
2018 56 45 0.03 0.0
2017 66 43 0.00 0.0
2016 72 51 0.00 0.0
2015 63 44 0.22 0.0
2014 63 46 0.20 0.0
2013 54 44 0.13 0.0
2012 68 40 0.00 0.0
2011 53 38 0.00 0.0
2010 51 43 0.87 0.0
2009 71 48 0.00 0.0
2008 51 36 0.03 n/a
2007 62 41 0.09 n/a
2006 54 41 0.36 n/a
2005 61 47 0.00 n/a
2004 60 44 0.00 n/a
2003 50 47 0.19 n/a
2002 49 42 0.05 n/a
2001 61 40 0.00 n/a
2000 63 47 0.10 n/a
1999 51 40 0.00 n/a
1998 65 50 0.00 n/a
1997 60 39 0.00 n/a
1996 60 41 0.00 0.0
1995 62 44 0.00 0.0
1994 60 45 0.12 0.0
1993 60 47 0.26 0.0
1992 57 40 0.26 0.0
1991 63 46 0.00 0.0
1990 60 47 0.00 0.0
1989 60 43 0.00 0.0
1988 53 44 0.03 0.0
1987 63 42 0.00 0.0
1986 56 46 0.01 0.0
1985 53 32 0.01 0.0
1984 56 43 0.00 0.0
1983 59 45 0.00 0.0
1982 76 42 0.00 0.0
1981 57 44 0.01 0.0
1980 56 42 0.00 0.0
1979 64 42 0.00 0.0
1978 50 39 0.17 0.0
1977 61 52 0.07 0.0
1976 55 39 0.00 0.0
1975 58 37 0.00 0.0
1974 56 43 0.03 0.0
1973 61 38 0.00 0.0
1972 51 39 0.02 0.0
1971 54 41 0.00 0.0
1970 49 41 0.02 0.0
1969 66 45 0.00 0.0
1968 55 38 0.00 0.0
1967 55 43 0.09 0.0
1966 58 43 0.00 0.0
1965 57 47 0.03 0.0
1964 50 41 0.04 0.0
1963 60 41 0.00 0.0
1962 62 46 0.00 0.0
1961 52 41 0.22 0.0
1960 49 35 0.06 0.0
1959 69 43 0.02 0.0
1958 51 41 0.28 0.0
1957 53 38 0.00 0.0
1956 65 46 0.00 0.0
1955 54 37 0.02 0.0
1954 59 36 0.00 0.0
1953 56 45 0.20 0.0
1952 65 33 0.00 0.0
1951 61 29 0.00 0.0
1950 50 33 0.00 0.0
1949 54 42 0.01 0.0
1948 55 44 0.09 0.0
1947 65 43 0.00 0.0
1946 54 41 0.00 0.0
1945 58 45 0.00 0.0
1944 61 42 0.00 0.0
1943 54 41 0.39 0.0
1942 56 43 0.08 0.0
1941 72 47 0.00 0.0
1940 66 45 0.00 0.0
1939 62 49 0.00 0.0
1938 66 47 0.00 0.0
1937 51 38 0.00 0.0
1936 67 49 0.00 0.0
1935 51 40 0.28 0.0
1934 70 54 0.00 0.0
1933 71 45 0.00 0.0
1932 57 41 0.00 0.0
1931 66 50 0.00 0.0
1930 68 51 0.05 0.0
1929 57 42 0.00 0.0
1928 56 44 0.07 0.0
1927 62 44 0.00 0.0
1926 53 45 0.07 0.0
1925 48 40 0.04 0.0
1924 56 42 0.00 0.0
1923 54 42 0.00 0.0
1922 59 40 0.20 0.0
1921 58 47 0.13 0.0
1920 48 38 0.00 0.0
1919 55 44 0.00 0.0
1918 68 52 0.00 0.0
1917 51 42 0.00 0.0
1916 49 40 0.02 0.0
1915 59 39 0.00 0.0
1914 57 38 0.00 0.0
1913 54 41 0.03 0.0
1912 52 41 0.04 0.0
1911 61 44 0.00 0.0
1910 59 46 0.00 0.0
1909 62 38 0.00 0.0
1908 51 42 0.18 0.0
1907 69 43 0.00 0.0
1906 67 51 0.00 0.0
1905 70 46 0.00 0.0
1904 59 44 0.03 0.0
1903 58 49 0.31 0.0
1902 58 40 0.00 0.0
1901 55 41 0.23 0.0
1900 54 41 0.00 0.0
1899 52 41 0.00 0.0
1898 53 42 0.19 0.0
1897 51 43 0.33 0.0
1896 64 42 0.00 0.0
1895 68 41 0.00 0.0
1894 54 40 0.01 0.0
What's the all-time high for Seattle on 4/21?
For the date of Apr 21, the highest temperature ever reached in Seattle history is 76 °F which happened in 1982.
Highest Temperatures in Seattle on April 21
Rank Temperature Year
1 76 °F 1982
2 73 °F 2021
3 72 °F 2016
3 72 °F 1941
5 71 °F 2009
5 71 °F 1933
7 70 °F 1934
7 70 °F 1905
9 69 °F 1959
9 69 °F 1907
What's the all-time low for Seattle on 4/21?
For the date of Apr 21, the lowest temperature ever reached in Seattle history is 29 °F which happened in 1951.
Lowest Temperatures in Seattle on April 21
Rank Temperature Year
1 29 °F 1951
2 32 °F 1985
3 33 °F 1952
3 33 °F 1950
5 35 °F 1960
6 36 °F 2008
6 36 °F 1954
8 37 °F 1955
8 37 °F 1975
10 38 °F 1920
10 38 °F 2011
10 38 °F 1937
10 38 °F 1909
10 38 °F 1973
10 38 °F 1968
10 38 °F 1957
10 38 °F 1914
Lowest High Temperatures in Seattle on April 21
Rank Temperature Year
1 48 °F 1920
1 48 °F 1925
3 49 °F 1970
3 49 °F 1960
3 49 °F 1916
3 49 °F 2002
7 50 °F 2003
7 50 °F 1950
7 50 °F 1978
7 50 °F 1964
What's the most it has ever rained in Seattle on 4/21?
For the date of Apr 21, the most precipitation ever recorded in Seattle history is 0.87 inches which happened in 2010.
All-Time Most Precipitation in Seattle on April 21
Rank Precipitation Year
1 0.87 inches 2010
2 0.39 inches 1943
3 0.36 inches 2006
4 0.33 inches 1897
5 0.31 inches 1903
6 0.28 inches 1958
6 0.28 inches 1935
8 0.26 inches 1992
8 0.26 inches 1993
10 0.23 inches 1901
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.
© H Brothers Inc, 2021–2024
Contact us | Privacy policy