Seattle City, WA: December

31 December 2025: December 2025 averaged 46.3°F in Seattle City, WA, the warmest December since 1966, 6th warmest of 132.

December 2025

Mean temperature: 46.3°F; Warmest since 1966; 6th warmest of 132
Precipitation: 6.63 in; Wettest since 2024; 43rd wettest of 131

A normal December in Seattle City, WA (1991 to 2020): a mean temperature of 42.1°F, between 38.5°F and 43.9°F in eight years of ten and 5.38 in of precipitation, between 2.40 in and 8.58 in in eight years of ten.

The mean temperature of every December in Seattle City, WA since 1894: 46.3°F in 2025; the highest is 47.9°F, in 1950.

Normal range, 38.5 to 43.9°F

Every year, ranked, as a table

Every December in Seattle City, WA from 1894 to 2025, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2025	46.3	6	50.7	5	41.9	8	6.63	43	0
2024	44.8	22	49.8	11	39.7	36	6.71	42	0
2023	45.2	13	50.5	6	39.8	34	8.83	12	0
2022	39.3	109	43.6	109	35.1	106	7.06	36	0
2021	38.9	116	42.7	123	35.1	106	4.71	78	0
2020	44.1	31	50	10	38.3	61	5.96	52	0
2019	44.2	29	47.8	45	40.6	21	7.31	30	0
2018	43.5	43	48.4	33	38.7	55	5.63	56	0
2017	40.5	100	46	85	35.1	106	4.83	76	0
2016	38.5	119	42.4	125	34.7	114	3.71	106	0
2015	43.4	47	47.3	59	39.6	38	9.41	8	0
2014	45.1	14	50.5	6	39.6	38	5.38	63	0
2013	38.5	119	43.1	118	33.8	122	1.67	125	0
2012	42.3	72	45.5	93	39	46	7.03	38	0
2011	40.7	99	45.4	95	36	97	1.49	126	0
2010	43.9	38	48.8	29	39	46	7.94	21	0
2009	38.1	124	44	107	32.3	130	2.29	122	0
2008	38	126	41.9	128	34.1	121	4.58	81	0
2007	40.8	98	44.7	101	37	86	9.10	10	0
2006	41.5	90	47.1	65	36	97	8.00	18	0
2005	41.8	85	46.6	76	37.1	83	7.39	28	0
2004	43.3	49	47	67	39.5	42	5.01	73	0
2003	42.3	72	47.2	62	37.4	81			0
2002	43.9	38	48.7	30	39	46	5.24	69	0
2001	42.3	72	47.7	48	36.8	90	5.10	71	0
2000	41.2	92	46.6	76	35.7	101	2.43	121	0
1999	43	56	47.4	55	38.6	56	3.90	101	0
1998	41	95	45.3	98	36.7	92	6.84	40	0
1997	42.9	60	48.9	27	36.9	88	2.48	119	0
1996	40.1	103	45.4	95	34.9	111	11.97	2	0
1995	43.1	54	49.1	23	37.1	83	7.77	22	0
1994	41.9	79	47.5	51	36.3	96	8.45	15	0
1993	41.9	79	47.2	62	36.5	94	6.09	50	0
1992	39.5	106	44.2	106	34.7	114	4.05	97	0
1991	42.5	64	47.2	62	37.8	69	2.64	117	0
1990	36.4	131	41.1	131	31.7	132	4.51	85	0
1989	44	33	47.6	50	40.4	23	4.52	84	0
1988	42.4	68	46.9	71	37.9	66	3.93	100	0
1987	40.2	102	45.4	95	35.1	106	7.10	34	0
1986	43.5	43	48.9	27	38	64	4.58	81	0
1985	38.1	124	43.1	118	33	127	1.22	130	0
1984	38.4	122	43.2	114	33.6	123	5.27	67	0
1983	37	130	42	127	32.1	131	5.52	59	0
1982	42.1	76	47.3	59	36.9	88	8.99	11	0
1981	42.5	64	47.1	65	37.9	66	7.40	27	0
1980	45.7	10	49.8	11	41.6	10	7.19	33	0
1979	44.8	22	49.7	13	39.9	30	10.29	5	0
1978	38.2	123	43	120	33.5	125	1.42	127	0
1977	42	77	47	67	37	86	5.81	53	0
1976	44.3	28	49.3	20	39.4	44	2.00	123	0
1975	43.3	49	47.8	45	38.8	52	7.57	26	0
1974	44.4	26	49.3	20	39.4	44	6.52	46	0
1973	44.2	29	48.4	33	40	29	9.56	7	0
1972	39.1	112	43	120	35.1	106	8.36	16	0
1971	39.1	112	42.8	122	35.4	105	5.29	65	0
1970	40.9	96	44.4	104	37.3	82	8.34	17	0
1969	46	7	49.4	17	42.6	5	6.89	39	0
1968	39.5	106	43.2	114	35.8	99	10.07	6	0
1967	43.7	42	47	67	40.3	25	5.33	64	0
1966	47.1	4	50.4	8	43.9	2	7.73	24	0
1965	43.4	47	46.9	71	39.9	30	7.06	36	0
1964	39.3	109	43.2	114	35.5	103	4.86	75	0
1963	44.6	24	48.3	36	40.9	17	4.94	74	0
1962	45.5	11	49.2	22	41.8	9	3.83	103	0
1961	42.4	68	45.9	87	38.8	52	5.58	58	0
1960	43	56	47.5	51	38.5	58	3.21	114	0
1959	43.5	43	47.4	55	39.6	38	6.20	49	0
1958	47.4	3	51.7	3	43	3	5.51	60	0
1957	46	7	50.4	8	41.6	10	4.36	89	0
1956	43.2	53	47.4	55	39	46	3.59	109	0
1955	41.2	92	45.9	87	36.6	93	8.00	18	0
1954	43.9	38	48	41	39.8	34	4.46	86	0
1953	44.9	20	48.7	30	41	16	3.31	112	0
1952	45.1	14	49.5	15	40.7	19	4.45	87	0
1951	39.8	104	44	107	35.7	101	4.15	91	0
1950	47.9	1	51.8	2	44.1	1	6.63	43	0
1949	41.8	85	46.1	83	37.5	79	4.59	80	0
1948	39	115	43.4	112	34.5	116	4.58	81	0
1947	45.1	14	49	24	41.2	13	6.26	48	0
1946	41.9	79	45.8	90	37.9	66	5.79	54	0
1945	43	56	47.5	51	38.6	56	5.49	61	0
1944	41.9	79	47	67	36.8	90	1.00	131	0
1943	43	56	48.3	36	37.8	69	1.27	129	0
1942	44.4	26	47.8	45	41.1	15	5.21	70	0
1941	44	33	48.4	33	39.5	42	7.08	35	0
1940	46.4	5	50.8	4	42	7	4.04	98	0
1939	47.5	2	52	1	43	3	10.41	4	0
1938	44	33	48	41	40.1	28	2.95	115	0
1937	44.9	20	49	24	40.8	18	8.49	14	0
1936	44	33	47.7	48	40.2	26	5.42	62	0
1935	45	18	49.6	14	40.4	23	4.11	95	0
1934	44	33	48.1	38	39.9	30	6.06	51	0
1933	45.1	14	49	24	41.2	13	15.33	1	0
1932	38.9	116	43.2	114	34.5	116	4.82	77	0
1931	41.9	79	46	85	37.7	72	6.54	45	0
1930	43.1	54	48.1	38	38.1	63	1.85	124	0
1929	43.5	43	47.5	51	39.6	38	5.26	68	0
1928	41.5	90	45.8	90	37.1	83	3.69	107	0
1927	38	126	42.4	125	33.6	123	3.34	111	0
1926	41.7	88	45.6	92	37.7	72	4.03	99	0
1925	45.5	11	49.4	17	41.6	10	4.30	90	0
1924	37.3	129	41.7	129	32.8	128	4.63	79	0
1923	42.2	75	46.3	80	38	64	3.31	112	0
1922	38.5	119	42.6	124	34.3	120	7.37	29	0
1921	39.1	112	43.4	112	34.8	112	7.25	31	0
1920	43.3	49	46.8	73	39.9	30	5.68	55	0
1919	38.6	118	43.6	109	33.5	125	4.10	96	0
1918	40.9	96	45.3	98	36.5	94	5.04	72	0
1917	45	18	49.4	17	40.7	19	9.21	9	0
1916	38	126	41.5	130	34.5	116	4.13	93	0
1915	42	77	46.3	80	37.7	72	7.77	22	0
1914	39.7	105	44.6	103	34.8	112	1.39	128	0
1913	42.4	68	47.3	59	37.5	79	2.61	118	0
1912	41.6	89	45.5	93	37.6	77	4.43	88	0
1911	41.2	92	44.7	101	37.7	72	3.75	104	0
1910	42.9	60	46.7	75	39	46	3.47	110	0
1909	36.3	132	40.2	132	32.4	129	2.69	116	0
1908	39.5	106	43.5	111	35.5	103	3.61	108	0
1907	43.3	49	47.9	44	38.8	52	6.33	47	0
1906	42.4	68	46.6	76	38.2	62	6.80	41	0
1905	42.5	64	47.4	55	37.7	72	5.62	57	0
1904	43.9	38	48.1	38	39.7	36	5.29	65	0
1903	42.6	62	46.8	73	38.4	59	4.14	92	0
1902	41.8	85	45.9	87	37.8	69	8.82	13	0
1901	42.5	64	46.5	79	38.4	59	2.45	120	0
1900	45.9	9	49.5	15	42.2	6	7.21	32	0
1899	44.1	31	48	41	40.2	26	3.90	101	0
1898	40.4	101	45	100	35.8	99	4.12	94	0
1897	42.6	62	46.2	82	38.9	51	11.80	3	2
1896	44.5	25	48.5	32	40.5	22	7.58	25	0
1895	41.9	79	46.1	83	37.6	77	7.98	20	0
1894	39.3	109	44.3	105	34.4	119	3.75	104	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1950	47.9
1939	47.5
1958	47.4
1966	47.1
1940	46.4
2025	46.3
1969	46
1957	46
1900	45.9
1980	45.7

Coldest
Year	Mean, °F
1909	36.3
1990	36.4
1983	37
1924	37.3
2008	38
1927	38
1916	38
2009	38.1
1985	38.1
1978	38.2

Wettest
Year	Precipitation, in
1933	15.33
1996	11.97
1897	11.80
1939	10.41
1979	10.29
1968	10.07
1973	9.56
2015	9.41
1917	9.21
2007	9.10

Driest
Year	Precipitation, in
1944	1.00
1985	1.22
1943	1.27
1914	1.39
1978	1.42
2011	1.49
2013	1.67
1930	1.85
1976	2.00
2009	2.29

The hottest, coldest and wettest days

Hottest day: 59°F; 15 December 2025
Coldest night: 32°F; 31 December 2025
Wettest day: 1.17 in; 8 December 2025

Every month, season and year

Months

Seasons

Years

Seattle City, WA the day's answers

All-time records

Every answer in words

December 2025 brought 6.63 in of precipitation in Seattle City, WA, the wettest December since 2024, tied 43rd wettest of 131 (with 1950).
The hottest day of December 2025 in Seattle City, WA: 59°F on Monday 15 December 2025.
The coldest night of December 2025 in Seattle City, WA: a low of 32°F on Wednesday 31 December 2025.
The wettest day of December 2025 in Seattle City, WA: 1.17 in on Monday 8 December 2025.