Seattle December 20 Weather Records

Daily averages and all-time records for weather in Seattle, Washington for the date of December 20.
December 20 All-Time Records
1894–2024
Highest temperature 60 °F 1919
Lowest temperature 14 °F 2008
Lowest daily high 21 °F 1990
Highest daily low 51 °F 1972
Most precipitation 3.25 inches 2019
Most snow 3.0 inches 2008
December 20 Average Weather
1991–2020 1
Average high 46.0 °F
Average low 36.5 °F
Chance precipitation 60.6%
Chance snow 5.4%
Seattle December 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 51 38 0.00 0.0
2022 42 29 0.66 0.6
2021 37 33 0.26 0.0
2020 54 47 0.06 0.0
2019 54 49 3.25 0.0
2018 59 40 0.27 0.0
2017 49 32 0.13 0.0
2016 50 40 0.01 0.0
2015 46 40 0.17 0.0
2014 55 44 0.77 0.0
2013 47 33 0.22 1.1
2012 45 33 0.52 0.0
2011 44 37 0.00 0.0
2010 43 36 0.03 0.0
2009 57 45 0.08 0.0
2008 26 14 0.16 3.0
2007 43 33 0.04 n/a
2006 45 36 0.37 n/a
2005 54 48 0.43 n/a
2004 45 33 0.00 n/a
2003 48 44 0.13 n/a
2002 50 42 0.00 n/a
2001 40 37 0.04 n/a
2000 43 31 0.06 n/a
1999 47 41 0.00 n/a
1998 24 15 0.00 n/a
1997 44 35 0.18 n/a
1996 44 38 0.18 n/a
1995 50 40 0.00 0.0
1994 56 45 1.13 0.0
1993 45 29 0.00 0.0
1992 44 38 0.08 0.0
1991 48 34 0.13 0.0
1990 21 14 0.00 0.0
1989 49 44 0.00 0.0
1988 43 37 0.26 0.0
1987 43 29 0.30 0.0
1986 48 36 0.00 0.0
1985 35 29 0.00 0.0
1984 35 24 0.12 1.6
1983 28 20 0.00 0.0
1982 45 38 0.46 0.0
1981 46 35 0.00 0.0
1980 50 41 0.46 0.0
1979 52 46 0.04 0.0
1978 44 34 0.04 0.2
1977 52 35 0.00 0.0
1976 46 33 0.00 0.0
1975 44 27 0.00 0.0
1974 54 47 0.60 0.0
1973 57 45 0.49 0.0
1972 54 51 0.40 0.0
1971 42 34 0.51 1.0
1970 41 33 0.33 1.3
1969 54 48 0.15 0.0
1968 33 24 0.00 0.0
1967 34 28 0.00 0.0
1966 47 41 0.01 0.0
1965 50 42 0.40 0.0
1964 39 33 0.30 0.0
1963 47 40 0.47 0.0
1962 50 37 0.00 0.0
1961 51 40 0.41 0.0
1960 46 38 0.00 0.0
1959 43 34 0.35 0.0
1958 51 45 1.13 0.0
1957 47 39 0.44 0.0
1956 47 38 0.35 0.0
1955 49 40 1.93 0.0
1954 51 38 0.00 0.0
1953 48 43 0.06 0.0
1952 41 34 0.07 0.0
1951 35 28 0.12 1.7
1950 52 44 0.39 0.0
1949 37 22 0.07 0.0
1948 45 32 0.00 0.0
1947 50 44 0.04 0.0
1946 43 38 0.00 0.0
1945 40 31 0.18 0.0
1944 49 42 0.00 0.0
1943 50 36 0.00 0.0
1942 49 45 0.26 0.0
1941 47 42 0.36 0.0
1940 54 49 0.10 0.0
1939 50 43 0.00 0.0
1938 43 36 0.26 0.0
1937 43 40 0.00 0.0
1936 53 45 0.00 0.0
1935 50 35 0.00 0.0
1934 54 43 0.20 0.0
1933 54 41 1.96 0.0
1932 47 39 0.78 0.0
1931 46 41 0.14 0.0
1930 48 40 0.00 0.0
1929 45 38 0.00 0.0
1928 44 29 0.00 0.0
1927 44 38 0.00 0.0
1926 47 40 0.36 0.0
1925 46 42 0.63 0.0
1924 29 20 0.00 0.0
1923 43 34 0.00 0.0
1922 52 40 0.00 0.0
1921 31 19 0.00 0.0
1920 44 41 0.12 0.0
1919 60 46 0.15 0.0
1918 44 41 0.01 0.0
1917 44 36 0.00 0.0
1916 43 37 0.06 0.0
1915 51 40 0.82 0.0
1914 42 27 0.00 0.0
1913 40 30 0.00 0.0
1912 44 39 0.15 0.0
1911 39 36 0.00 0.0
1910 46 37 0.00 0.0
1909 42 30 0.00 0.0
1908 39 26 0.01 0.0
1907 47 37 0.32 0.0
1906 46 42 0.44 0.0
1905 42 38 0.05 0.0
1904 46 37 0.00 0.0
1903 48 44 0.62 0.0
1902 48 39 0.22 0.0
1901 48 30 0.01 0.0
1900 55 49 2.00 0.0
1899 50 38 0.71 0.0
1898 41 36 0.18 0.0
1897 40 36 0.00 0.0
1896 55 44 0.00 0.0
1895 40 37 0.00 0.0
1894 48 33 0.05 0.0
What's the all-time high for Seattle on 12/20?
For the date of Dec 20, the highest temperature ever reached in Seattle history is 60 °F which happened in 1919.
Highest Temperatures in Seattle on December 20
Rank Temperature Year
1 60 °F 1919
2 59 °F 2018
3 57 °F 2009
3 57 °F 1973
5 56 °F 1994
6 55 °F 2014
6 55 °F 1900
6 55 °F 1896
9 54 °F 1972
9 54 °F 1933
9 54 °F 1934
9 54 °F 2019
9 54 °F 2020
9 54 °F 2005
9 54 °F 1969
9 54 °F 1974
9 54 °F 1940
What's the all-time low for Seattle on 12/20?
For the date of Dec 20, the lowest temperature ever reached in Seattle history is 14 °F which has happened 2 times, most recently in 2008.
Lowest Temperatures in Seattle on December 20
Rank Temperature Year
1 14 °F 2008
1 14 °F 1990
3 15 °F 1998
4 19 °F 1921
5 20 °F 1924
5 20 °F 1983
7 22 °F 1949
8 24 °F 1984
8 24 °F 1968
10 26 °F 1908
Lowest High Temperatures in Seattle on December 20
Rank Temperature Year
1 21 °F 1990
2 24 °F 1998
3 26 °F 2008
4 28 °F 1983
5 29 °F 1924
6 31 °F 1921
7 33 °F 1968
8 34 °F 1967
9 35 °F 1985
9 35 °F 1951
9 35 °F 1984
What's the most it has ever rained in Seattle on 12/20?
For the date of Dec 20, the most precipitation ever recorded in Seattle history is 3.25 inches which happened in 2019.
All-Time Most Precipitation in Seattle on December 20
Rank Precipitation Year
1 3.25 inches 2019
2 2.00 inches 1900
3 1.96 inches 1933
4 1.93 inches 1955
5 1.13 inches 1958
5 1.13 inches 1994
7 0.82 inches 1915
8 0.78 inches 1932
9 0.77 inches 2014
10 0.71 inches 1899
All-Time Most Snow in Seattle on December 20
Rank Precipitation Year
1 3.0 inches 2008
2 1.7 inches 1951
3 1.6 inches 1984
4 1.3 inches 1970
5 1.1 inches 2013
6 1.0 inches 1971
7 0.6 inches 2022
8 0.2 inches 1978
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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