Average December Temperature in Seattle by Year

This page contains a list of the average monthly high and low temperatures in Seattle, Washington for the month of December each year between 1894 and 2023. It is based on NOAA data.

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What Was the Hottest December Ever in Seattle?

1939 was the warmest December in the history of Seattle, Washington. The average daily high temperature was 52.0 °F, and the average low was 43.0 °F.

What Was the Coldest December Ever in Seattle?

1990 was the coolest December in the history of Seattle, Washington. The average daily high temperature was 40.1 °F, and the average low was 30.4 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	5	50.6	40.4
2022	106	43.2	34.4
2021	113	41.9	34.2
2020	19	49.8	38.9
2019	17	48.2	40.7
2018	21	48.9	39.4
2017	91	45.5	34.5
2016	116	41.9	34.0
2015	41	47.1	38.9
2014	6	50.2	40.3
2013	94	44.6	34.8
2012	77	45.0	37.9
2011	102	44.3	34.0
2010	36	47.9	38.4
2009	117	43.7	32.1
2008	121	40.8	33.0
2007	93	43.6	36.0
2006	86	45.8	35.4
2005	44	47.4	37.9
2004	49	46.9	38.0
2003	68	46.6	36.9
2002	40	47.8	38.2
2001	75	46.7	36.3
2000	84	46.0	35.5
1999	59	46.1	37.8
1998	92	44.2	35.6
1997	74	47.4	35.6
1996	100	44.2	34.3
1995	52	47.5	37.3
1994	67	46.5	36.9
1993	79	47.1	35.7
1992	107	43.2	34.3
1991	30	48.4	39.0
1990	130	40.1	30.4
1989	43	47.3	38.5
1988	62	46.7	37.1
1987	101	44.6	33.9
1986	60	47.3	36.6
1985	127	41.4	30.9
1984	122	41.4	32.1
1983	128	40.7	31.5
1982	85	45.6	35.9
1981	70	46.0	37.3
1980	25	48.2	39.9
1979	23	48.9	39.3
1978	119	42.8	32.2
1977	57	46.7	37.6
1976	15	49.8	39.6
1975	76	46.5	36.4
1974	51	47.2	37.7
1973	20	48.5	40.2
1972	112	41.6	34.5
1971	118	41.8	33.2
1970	104	42.7	35.2
1969	7	49.7	40.7
1968	123	41.2	32.0
1967	73	45.5	37.6
1966	33	47.4	39.6
1965	87	45.2	35.7
1964	125	41.3	31.5
1963	82	45.6	35.9
1962	55	47.0	37.5
1961	98	43.7	34.9
1960	97	44.9	34.0
1959	89	45.1	35.4
1958	13	49.6	40.1
1957	31	48.6	38.7
1956	90	45.1	35.3
1955	111	43.6	33.1
1954	83	45.7	35.8
1953	54	46.9	37.6
1952	71	47.0	36.3
1951	124	41.6	31.2
1950	14	49.1	40.4
1949	110	43.5	33.2
1948	129	41.2	30.8
1947	9	49.0	41.2
1946	65	45.8	37.9
1945	39	47.5	38.6
1944	61	47.0	36.8
1943	38	48.3	37.8
1942	18	47.8	41.1
1941	27	48.4	39.5
1940	2	50.8	42.0
1939	1	52.0	43.0
1938	24	48.1	40.1
1937	12	49.0	40.8
1936	28	47.7	40.2
1935	11	49.7	40.4
1934	26	48.1	39.9
1933	8	49.0	41.2
1932	105	43.2	34.5
1931	63	46.0	37.7
1930	37	48.1	38.1
1929	32	47.4	39.6
1928	78	45.8	37.1
1927	115	42.4	33.6
1926	69	45.6	37.7
1925	4	49.4	41.6
1924	120	41.7	32.9
1923	56	46.3	38.0
1922	109	42.6	34.3
1921	103	43.4	34.8
1920	34	46.8	39.9
1919	108	43.6	33.5
1918	81	45.3	36.5
1917	10	49.4	40.7
1916	114	41.5	34.5
1915	58	46.3	37.7
1914	95	44.6	34.8
1913	53	47.3	37.5
1912	72	45.5	37.6
1911	80	44.7	37.7
1910	42	46.8	39.0
1909	126	40.2	32.4
1908	96	43.5	35.5
1907	35	47.9	38.8
1906	50	46.6	38.2
1905	46	47.4	37.7
1904	29	48.1	39.7
1903	45	46.8	38.4
1902	66	45.9	37.8
1901	48	46.5	38.4
1900	3	49.5	42.2
1899	22	48.0	40.2
1898	88	45.0	35.8
1897	47	46.2	38.8
1896	16	48.5	40.5
1895	64	46.1	37.6
1894	99	44.3	34.4

Weather Station Details

Years	Station	Coordinates
1948–2024	Seattle Tacoma International Airport	location
1894–1947	University of Washington	location