Seattle May 21 Weather Records

Daily averages and all-time records for weather in Seattle, Washington for the date of May 21.
May 21 All-Time Records
1894–2024
Highest temperature 93 °F 1963
Lowest temperature 39 °F 1960
Lowest daily high 52 °F 1996
Highest daily low 58 °F 1914
Most precipitation 0.59 inches 1939
Most snow none -
May 21 Average Weather
1991–2020 1
Average high 66.5 °F
Average low 49.1 °F
Chance precipitation 34.2%
Chance snow 0%
Seattle May 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 60 52 0.00 0.0
2022 67 44 0.00 0.0
2021 62 45 0.00 0.0
2020 59 47 0.36 0.0
2019 62 50 0.02 0.0
2018 72 54 0.00 0.0
2017 76 52 0.00 0.0
2016 58 50 0.21 0.0
2015 78 53 0.00 0.0
2014 68 51 0.00 0.0
2013 60 47 0.54 0.0
2012 62 50 0.55 0.0
2011 54 48 0.04 0.0
2010 55 45 0.10 0.0
2009 67 45 0.00 0.0
2008 57 47 0.10 n/a
2007 60 45 0.31 n/a
2006 69 48 0.03 n/a
2005 61 45 0.23 n/a
2004 62 51 0.00 n/a
2003 66 51 0.01 n/a
2002 60 48 0.06 n/a
2001 74 47 0.00 n/a
2000 67 53 0.09 n/a
1999 63 46 0.00 n/a
1998 58 50 0.00 n/a
1997 64 46 0.00 n/a
1996 52 45 0.08 0.0
1995 76 51 0.00 0.0
1994 68 50 0.00 0.0
1993 63 52 0.12 0.0
1992 66 42 0.00 0.0
1991 62 49 0.00 0.0
1990 67 47 0.08 0.0
1989 62 42 0.00 0.0
1988 85 49 0.00 0.0
1987 71 46 0.00 0.0
1986 57 43 0.02 0.0
1985 71 46 0.00 0.0
1984 61 41 0.00 0.0
1983 67 53 0.00 0.0
1982 72 48 0.00 0.0
1981 58 48 0.00 0.0
1980 59 47 0.21 0.0
1979 75 47 0.00 0.0
1978 62 45 0.00 0.0
1977 65 51 0.03 0.0
1976 72 46 0.00 0.0
1975 61 44 0.02 0.0
1974 69 46 0.00 0.0
1973 67 43 0.00 0.0
1972 58 52 0.11 0.0
1971 66 41 0.00 0.0
1970 64 47 0.00 0.0
1969 81 52 0.00 0.0
1968 64 50 0.00 0.0
1967 69 51 0.00 0.0
1966 57 41 0.10 0.0
1965 64 43 0.00 0.0
1964 57 44 0.00 0.0
1963 93 57 0.00 0.0
1962 61 45 0.00 0.0
1961 62 48 0.00 0.0
1960 53 39 0.00 0.0
1959 62 48 0.00 0.0
1958 81 52 0.00 0.0
1957 55 47 0.34 0.0
1956 68 47 0.00 0.0
1955 58 42 0.00 0.0
1954 60 46 0.00 0.0
1953 55 42 0.42 0.0
1952 60 48 0.24 0.0
1951 77 43 0.00 0.0
1950 63 47 0.00 0.0
1949 70 48 0.00 0.0
1948 62 47 0.00 0.0
1947 71 51 0.00 0.0
1946 76 51 0.00 0.0
1945 66 52 0.00 0.0
1944 57 44 0.08 0.0
1943 59 53 0.02 0.0
1942 74 56 0.20 0.0
1941 66 51 0.00 0.0
1940 80 53 0.00 0.0
1939 62 50 0.59 0.0
1938 83 53 0.00 0.0
1937 68 50 0.00 0.0
1936 62 52 0.01 0.0
1935 66 54 0.00 0.0
1934 69 48 0.00 0.0
1933 60 49 0.00 0.0
1932 60 45 0.02 0.0
1931 65 51 0.01 0.0
1930 58 44 0.04 0.0
1929 72 48 0.00 0.0
1928 66 53 0.00 0.0
1927 58 46 0.00 0.0
1926 58 51 0.00 0.0
1925 56 50 0.00 0.0
1924 74 50 0.00 0.0
1923 64 48 0.00 0.0
1922 53 43 0.42 0.0
1921 68 49 0.00 0.0
1920 55 44 0.03 0.0
1919 72 49 0.00 0.0
1918 57 43 0.00 0.0
1917 58 48 0.00 0.0
1916 52 40 0.37 0.0
1915 62 51 0.00 0.0
1914 76 58 0.00 0.0
1913 71 46 0.00 0.0
1912 57 50 0.01 0.0
1911 62 49 0.00 0.0
1910 76 49 0.00 0.0
1909 58 45 0.00 0.0
1908 57 46 0.05 0.0
1907 63 46 0.00 0.0
1906 58 48 0.06 0.0
1905 57 44 0.14 0.0
1904 73 49 0.00 0.0
1903 58 41 0.00 0.0
1902 63 51 0.00 0.0
1901 62 47 0.01 0.0
1900 60 51 0.05 0.0
1899 63 48 0.00 0.0
1898 60 50 0.40 0.0
1897 66 48 0.00 0.0
1896 72 44 0.00 0.0
1895 59 47 0.00 0.0
1894 64 48 0.00 0.0
What's the all-time high for Seattle on 5/21?
For the date of May 21, the highest temperature ever reached in Seattle history is 93 °F which happened in 1963.
Highest Temperatures in Seattle on May 21
Rank Temperature Year
1 93 °F 1963
2 85 °F 1988
3 83 °F 1938
4 81 °F 1969
4 81 °F 1958
6 80 °F 1940
7 78 °F 2015
8 77 °F 1951
9 76 °F 2017
9 76 °F 1946
9 76 °F 1995
9 76 °F 1910
9 76 °F 1914
What's the all-time low for Seattle on 5/21?
For the date of May 21, the lowest temperature ever reached in Seattle history is 39 °F which happened in 1960.
Lowest Temperatures in Seattle on May 21
Rank Temperature Year
1 39 °F 1960
2 40 °F 1916
3 41 °F 1966
3 41 °F 1903
3 41 °F 1984
3 41 °F 1971
7 42 °F 1992
7 42 °F 1989
7 42 °F 1953
7 42 °F 1955
Lowest High Temperatures in Seattle on May 21
Rank Temperature Year
1 52 °F 1996
1 52 °F 1916
3 53 °F 1960
3 53 °F 1922
5 54 °F 2011
6 55 °F 1957
6 55 °F 1920
6 55 °F 2010
6 55 °F 1953
10 56 °F 1925
What's the most it has ever rained in Seattle on 5/21?
For the date of May 21, the most precipitation ever recorded in Seattle history is 0.59 inches which happened in 1939.
All-Time Most Precipitation in Seattle on May 21
Rank Precipitation Year
1 0.59 inches 1939
2 0.55 inches 2012
3 0.54 inches 2013
4 0.42 inches 1922
4 0.42 inches 1953
6 0.40 inches 1898
7 0.37 inches 1916
8 0.36 inches 2020
9 0.34 inches 1957
10 0.31 inches 2007
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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