Portland Downtown, OR: December

31 December 2025: December 2025 averaged 47.4°F in Portland Downtown, OR, the warmest December since 1950 (1977 excluded: 31 of 31 days missing; 1979 excluded: 4 of 31 days missing; 1999 excluded: 31 of 31 days missing; 1 more year excluded for missing days), 4th warmest of 147.

December 2025

Mean temperature: 47.4°F; Warmest since 1950; 4th warmest of 147
Precipitation: 8.52 in; Wettest since 2023; 47th wettest of 149

A normal December in Portland Downtown, OR (1991 to 2020): a mean temperature of 42.2°F, between 38°F and 43.9°F in eight years of ten.

The mean temperature of every December in Portland Downtown, OR since 1874: 47.4°F in 2025; the highest is 48.4°F, in 1917.

Normal range, 38 to 43.9°F

Every year, ranked, as a table

Every December in Portland Downtown, OR from 1872 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	47.4	4	51.8	4	42.9	3	8.52	47	0
2024	44.2	25	48.7	30	39.6	27	7.27	63	0
2023	45.5	11	50	15	41.1	10	9.91	32	0
2022	38.6	125	42.9	127	34.4	120	7.36	61	0
2021	39.7	113	43.8	119	35.8	109	8.90	42	1
2020	43.9	33	48.8	28	39	37	6.22	86	0
2019	43.2	48	47.3	57	39	37	5.16	100	0
2018	43.6	45	47.7	50	39.5	31	6.84	71	0
2017	39.9	111	44.1	117	35.6	111	4.23	117	0
2016	37	139	41	143	33.1	136			0
2015	42.9	58	46.9	67	38.9	44	18.61	2	0
2014	44.5	21	48.9	27	40	24	6.78	73	0
2013	37.1	138	41.6	139	32.6	140	1.77	147	0
2012	42.2	73	46.1	84	38.3	58	9.14	39	0
2011	39.6	114	45.2	103	33.9	129	3.37	135	1
2010	43	54	47.1	62	38.9	44	10.23	26	0
2009	37.9	133	42.8	129	32.9	137	4.99	104	0
2008	38	131	42.6	133	32.9	137			3
2007	41.1	92	44.7	108	37.5	75	11.27	15	0
2006			46.1	84	35.9	107	6.42	80	4
2005	40.7	101	44.7	108	36.6	89	10.20	27	2
2004	44	28	48	45	40	24	4.58	111	0
2003	42.7	63	46.5	79	38.8	50	10.43	20	1
2002	44.3	22	48.4	36	40.2	19	10.48	19	0
2001	42.5	67	46	89	39	37	7.83	55	0
2000	41.2	89	46	89	36.4	92	3.85	123	0
1998	40.8	99	45.4	100	36.2	98			0
1997	42	78	45.8	93	38.2	62	4.00	121	0
1996	42.1	74	46.7	75	37.5	75	16.28	4	0
1995	42.9	58	47.3	57	38.4	55	7.84	54	0
1994	43	54	47.6	55	38.3	58	6.53	79	0
1993	41.4	85	46.6	76	36.2	98	6.86	70	0
1992	39.2	119	42.9	127	35.5	112	6.84	71	0
1991	43.2	48	47	63	39.3	33	4.88	105	0
1990	34.9	145	39.6	147	30.1	146	3.74	127	0
1989	41	94	45.5	97	36.4	92	3.82	124	0
1988	42.1	74	46.8	71	37.4	77	3.04	140	0
1987	39.5	116	43.4	122	35.5	112	9.19	38	0
1986	41.6	82	46.1	84	37.1	80	4.23	117	0
1985	35	144	40.2	145	29.8	147	2.20	145	0
1984	37.9	133	41.6	139	34	126	3.38	134	1
1983	36.1	141	40	146	31.9	143	5.78	95	1
1982	41.2	89	46.3	81	36.1	102	9.40	36	0
1981	42.6	65	47.3	57	37.9	67	10.34	22	0
1980	44.7	20	50.1	14	39.3	33	10.27	24	0
1979							6.98	66	4
1978	37.5	136	42.7	130	32.4	141	2.85	143	0
1976	41.3	87	46.6	76	36	103	1.36	148	0
1975	43.7	39	48.5	34	38.9	44	6.74	74	0
1974	44	28	49.1	23	38.9	44	6.93	67	0
1973	44.9	17	49.3	22	40.5	14	9.88	33	0
1972	38.1	128	42.5	134	33.6	132	10.13	28	0
1971	40.9	98	45.2	103	36.6	89	11.74	10	0
1970	41.5	83	45.9	91	37.1	80	10.24	25	0
1969	44.3	22	48.4	36	40.2	19	10.07	29	0
1968	38.6	125	43.2	126	34	126	12.92	9	0
1967	43.1	52	47.8	48	38.4	55	6.40	82	0
1966	46	9	50.5	10	41.6	9	9.02	41	0
1965	40.8	99	45.6	95	36	103	9.95	31	0
1964	40.3	108	45.5	97	35.1	115	11.45	12	0
1963	43.2	48	48.4	36	37.9	67	4.70	109	0
1962	45.4	13	50.3	12	40.4	16	2.86	142	0
1961	42.7	63	47.2	61	38.2	62	6.74	74	0
1960	41	94	46.3	81	35.8	109	3.62	129	0
1959	42.8	62	47.7	50	37.9	67	3.73	128	0
1958	46.5	7	50.9	7	42.1	6	5.70	96	0
1957	44.8	19	49.9	17	39.6	27	8.72	46	0
1956	41.9	80	47	63	36.7	87	3.90	122	0
1955	41.2	89	46.1	84	36.4	92	11.02	17	0
1954	42.5	67	46.8	71	38.2	62	6.11	87	0
1953	45	15	49.5	20	40.6	12	9.20	37	0
1952	43.7	39	48.5	34	39	37	7.55	57	0
1951	39.2	119	43.5	120	35	117	6.64	77	0
1950	47.7	2	52.8	1	43.1	2	6.91	68	2
1949	42.5	67	46.8	71	38.3	58	5.44	97	0
1948	39.3	118	43.4	122	35.2	114	10.04	30	1
1947	45	15	49.8	19	40.3	17	4.79	106	0
1946	43.7	39	47.9	46	39.6	27	6.01	89	2
1945	42.5	67	46.8	71	38.3	58	6.04	88	0
1944	40.4	104	44.5	113	36.4	92	2.18	146	0
1943	42.1	74	47	63	37.1	80	3.03	141	0
1942	44.3	22	48.2	41	40.3	17	11.09	16	0
1941	43.8	38	47.9	46	39.7	26	10.38	21	0
1940	44	28	49	24	39	37	5.03	103	0
1939	46.4	8	51	6	41.7	8	8.37	49	0
1938	43.7	39	48.1	43	39.2	35	4.16	119	0
1937	44	28	49	24	39	37	13.86	7	0
1936	43.7	39	47.3	57	40.2	19	8.28	51	0
1935	42.1	74	46.6	76	37.7	72	5.89	93	0
1934	44.1	26	48.1	43	40.1	23	10.83	18	0
1933	46.6	6	50.5	10	42.8	4	17.45	3	0
1932	38.1	128	42.7	130	33.5	134	7.87	53	0
1931	40.1	109	44.4	115	35.9	107	8.40	48	0
1930	40.5	103	44.7	108	36.2	98	3.16	136	0
1929	45.3	14	49.9	17	40.7	11	8.79	44	0
1928	40.1	109	45.2	103	35.1	115	7.51	60	0
1927	37.8	135	42.5	134	33.2	135	3.47	132	0
1926	41	94	45.6	95	36.3	96	5.91	91	0
1925	45.8	10	50.9	7	40.6	12	5.14	102	0
1924	35.8	142	41.1	142	31.2	144	4.44	114	2
1923	41.5	83	46.3	81	36.7	87	6.25	85	0
1922	38	131	42.5	134	33.6	132	9.43	35	0
1921	39.1	121	44	118	34.2	125	3.09	139	0
1920	44.1	26	47.7	50	40.5	14	8.32	50	0
1919	33.6	146	38.5	148	28.6	148	4.78	107	0
1918	42.3	72	46.9	67	37.7	72	3.13	138	0
1917	48.4	1	52.5	3	44.3	1	14.23	5	0
1916	38.1	128	41.8	138	34.4	120	3.81	125	0
1915	42	78	46.1	84	38	66	8.73	45	0
1914	36.8	140	41.5	141	32.1	142	2.56	144	0
1913	40.7	101	44.3	116	37.1	80	3.48	131	0
1912	41.4	85	45.9	91	37	84	8.03	52	0
1911	41.3	87	45.5	97	37.2	79	4.74	108	0
1910	42.9	58	46.9	67	38.9	44	3.53	130	0
1909	35.6	143	40.4	144	30.8	145	4.47	113	0
1908	39	122	43.3	124	34.8	118	3.80	126	0
1907	44	28	48.7	30	39.2	35	9.10	40	0
1906	43	54	47.4	56	38.5	52	7.55	57	2
1905	40.4	104	44.9	107	36	103	6.41	81	2
1904	43.3	46	47.7	50	38.9	44	7.14	65	0
1903	41	94	45.8	93	36.3	96	3.14	137	0
1902	40.4	104	44.5	113	36.2	98	10.28	23	0
1901	41.1	92	45.3	102	36.9	85	4.01	120	0
1900	44.9	17	50.3	12	39.4	32	6.01	89	0
1899	43.1	52	47.7	50	38.5	52	5.91	91	0
1898	37.5	136	42.1	137	32.9	137	4.29	116	0
1897	43.2	48	47.8	48	38.5	52	8.84	43	0
1896	43.9	33	48.2	41	39.6	27	6.26	84	0
1895			45.4	100	36	103	7.79	56	4
1894	39.6	114	44.6	112	34.3	122	3.47	132	2
1893	43.9	33	48.8	28	39	37	4.61	110	2
1892	38.3	127	42.7	130	33.9	129	6.69	76	0
1891	41.9	80	46.5	79	37.3	78	11.45	12	2
1890	43	54	48.3	39	37.6	74	4.34	115	0
1889	38.7	124	43.3	124	34	126	5.79	94	1
1888	43.7	39	48.6	32	38.8	50	5.19	99	0
1887	42.5	67	47	63	37.9	67	11.34	14	0
1886	45.5	11	50.9	7	40.2	19	11.52	11	0
1885	43.9	33	50	15	37.8	71	7.17	64	0
1884	31.6	147	37.5	149	25.6	149	7.52	59	0
1883	42.9	58	49	24	36.9	85	6.34	83	0
1882	46.8	5	51.5	5	41.9	7	20.14	1	1
1881	43.9	33	49.5	20	38.4	55	6.64	77	0
1880	39.8	112	45.1	106	34.5	119	13.93	6	0
1879	38.9	123	43.5	120	34.3	122	7.36	61	0
1878	39.5	116	44.7	108	34.3	122	4.52	112	0
1877	42.6	65	48.6	32	36.5	91	6.87	69	0
1876	40.4	104	46.9	67	33.9	129	0.88	149	0
1875	47.5	3	52.8	1	42.4	5	13.41	8	2
1874	43.3	46	48.3	39	38.2	62	5.24	98	0
1873							5.15	101	31
1872							9.47	34	31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1917	48.4
1950	47.7
1875	47.5
2025	47.4
1882	46.8
1933	46.6
1958	46.5
1939	46.4
1966	46
1925	45.8

Coldest
Year	Mean, °F
1884	31.6
1919	33.6
1990	34.9
1985	35
1909	35.6
1924	35.8
1983	36.1
1914	36.8
2016	37
2013	37.1

Wettest
Year	Precipitation, in
1882	20.14
2015	18.61
1933	17.45
1996	16.28
1917	14.23
1880	13.93
1937	13.86
1875	13.41
1968	12.92
1971	11.74

Driest
Year	Precipitation, in
1876	0.88
1976	1.36
2013	1.77
1944	2.18
1985	2.20
1914	2.56
1978	2.85
1962	2.86
1943	3.03
1988	3.04

The hottest, coldest and wettest days

Hottest day: 60°F; 11 December 2025, 10 December 2025
Coldest night: 35°F; 29 December 2025, 1 December 2025
Wettest day: 1.98 in; 18 December 2025

Every month, season and year

Months

Seasons

Years

Portland Downtown, OR the day's answers

All-time records

Every answer in words

December 2025 brought 8.52 in of precipitation in Portland Downtown, OR, the wettest December since 2023, 47th wettest of 149.
The hottest day of December 2025 in Portland Downtown, OR: 60°F on Thursday 11 December 2025 and Wednesday 10 December 2025.
The coldest night of December 2025 in Portland Downtown, OR: a low of 35°F on Monday 29 December 2025 and Monday 1 December 2025.
The wettest day of December 2025 in Portland Downtown, OR: 1.98 in on Thursday 18 December 2025.