Portland, OR: December

31 December 2025: December 2025 averaged 47.4°F in Portland, OR, the warmest December on record, in 86 years since 1940; provisional.

December 2025

Mean temperature: 47.4°F; Warmest on record; Warmest of 86, provisional
Precipitation: 8.51 in; Wettest since 2023; 13th wettest of 86

A normal December in Portland, OR (1991 to 2020): a mean temperature of 41.8°F, between 37.5°F and 43.9°F in eight years of ten and 5.05 in of precipitation, between 3.08 in and 8.04 in in eight years of ten.

The mean temperature of every December in Portland, OR since 1940: 47.4°F in 2025, the highest of them all.

Normal range, 37.5 to 43.9°F

Every year, ranked, as a table

Every December in Portland, OR from 1940 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
2025	47.4	1	52.6	1	42.3	1	8.51	13
2024	44.9	4	50.3	4	39.5	5	6.79	33
2023	46.1	3	51.4	2	40.9	3	8.73	12
2022	39	69	43.8	72	34.1	61	7.76	23
2021	41.1	44	45.8	52	36.5	36	7.10	31
2020	43.9	12	49.5	9	38.3	16	5.09	48
2019	43	20	48.1	22	38	22	4.39	61
2018	44	10	49.1	12	38.8	10	5.08	49
2017	39.8	59	45.5	55	34.2	60	3.09	71
2016	37.2	79	42.3	79	32.2	77	4.61	60
2015	43.4	17	47.7	28	39.1	7	15.24	1
2014	44.1	8	49.2	11	39.1	7	6.05	40
2013	36.4	81	41.6	81	31.1	82	1.62	85
2012	42.8	25	47.1	37	38.5	13	7.56	25
2011	39.1	68	45.3	61	32.8	72	2.51	79
2010	42.6	28	46.6	42	38.5	13	8.35	15
2009	35.6	83	41.6	81	29.6	83	3.76	65
2008	37.5	75	42.8	74	32.1	78	3.52	69
2007	40.9	46	45.5	55	36.4	40	7.57	24
2006	40	56	45.3	61	34.7	54	5.85	44
2005	39.8	59	44.2	68	35.3	50	7.52	26
2004	43.2	19	48.2	21	38.3	16	3.91	64
2003	42.5	31	47.2	34	37.8	25	7.45	28
2002	43.4	17	48.5	17	38.3	16	8.00	20
2001	41.9	37	46.9	38	37	33	6.62	37
2000	40.3	52	45.5	55	35.2	52	3.47	70
1999	43.9	12	49.1	12	38.7	11	3.62	67
1998	40.5	50	45.5	55	35.5	48	6.74	35
1997	41.1	44	46.1	46	36.1	44	3.03	74
1996	41.6	40	46.7	41	36.5	36	13.35	2
1995	42.4	32	47.4	33	37.4	29	5.91	43
1994	42.3	33	47.5	31	37	33	4.85	56
1993	41.4	42	48	24	34.7	54	5.01	52
1992	39.3	65	44	70	34.6	58	4.98	54
1991	42.7	26	47.8	26	37.6	27	4.34	62
1990	34.7	85	40	85	29.4	84	2.40	81
1989	40.3	52	45.9	51	34.6	58	3.08	72
1988	42	35	47.5	31	36.4	40	2.37	82
1987	39	69	44.2	68	33.9	63	8.00	20
1986	40.5	50	46.4	43	34.7	54	4.30	63
1985	33	86	39.2	86	26.8	86	2.19	83
1984	38.3	72	42.8	74	33.8	65	2.56	78
1983	36.3	82	40.2	84	32.5	73	5.30	47
1982	41.7	39	47.2	34	36.2	43	8.16	16
1981	42.6	28	47.9	25	37.4	29	8.37	14
1980	44	10	50.2	5	37.8	25	9.72	7
1979	44.4	6	49.9	6	38.9	9	7.23	30
1978	35.2	84	41.6	81	28.9	85	2.51	79
1977	42	35	46.9	38	37.1	32	8.98	10
1976	39.5	63	45.4	59	33.5	68	1.38	86
1975	42.7	26	48.1	22	37.2	31	6.68	36
1974	44.1	8	49.6	7	38.6	12	6.05	40
1973	44.7	5	49.6	7	39.7	4	9.93	5
1972	37.4	77	43.1	73	31.7	80	8.79	11
1971	40.3	52	45.3	61	35.4	49	8.05	19
1970	39.9	58	45.8	52	34.1	61	7.49	27
1969	42.9	22	47.8	26	37.9	24	8.12	17
1968	37.3	78	42.2	80	32.4	75	11.12	3
1967	40.3	52	45.6	54	35.1	53	4.75	58
1966	44.2	7	48.9	16	39.5	5	6.89	32
1965	39.4	64	45.4	59	33.5	68	7.34	29
1964	37	80	42.6	77	31.4	81	9.92	6
1963	38	73	43.9	71	32	79	3.60	68
1962	42.6	28	48.5	17	36.6	35	2.59	77
1961	40.9	46	46.1	46	35.7	46	5.94	42
1960	38.7	71	44.8	65	32.5	73	2.61	76
1959	39.6	62	46	48	33.2	71	3.08	72
1958	43.6	16	49.1	12	38	22	5.06	50
1957	43.9	12	49.3	10	38.5	13	6.15	39
1956	40.6	49	46	48	35.3	50	3.64	66
1955	39.2	67	44.7	67	33.7	66	10.14	4
1954	40.9	46	46	48	35.7	46	5.01	52
1953	43.7	15	49.1	12	38.3	16	7.85	22
1952	41.6	40	46.8	40	36.4	40	6.76	34
1951	37.5	75	42.6	77	32.4	75	5.06	50
1950	46.4	2	51.4	2	41.4	2	6.31	38
1949	41.4	42	46.3	44	36.5	36	4.86	55
1948	38	73	42.8	74	33.3	70	8.06	18
1947	42.9	22	48.3	20	37.5	28	4.64	59
1946	41.9	37	47.2	34	36.5	36	5.47	46
1945	39.8	59	44.9	64	34.7	54	5.61	45
1944	39.3	65	44.8	65	33.9	63	1.90	84
1943	40	56	46.3	44	33.6	67	2.70	75
1942	43	20	47.7	28	38.3	16	9.37	8
1941	42.9	22	47.7	28	38.1	21	9.11	9
1940	42.3	33	48.5	17	36	45	4.85	56

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2025	47.4
1950	46.4
2023	46.1
2024	44.9
1973	44.7
1979	44.4
1966	44.2
2014	44.1
1974	44.1
2018	44
More years share the last value

Coldest
Year	Mean, °F
1985	33
1990	34.7
1978	35.2
2009	35.6
1983	36.3
2013	36.4
1964	37
2016	37.2
1968	37.3
1972	37.4

Wettest
Year	Precipitation, in
2015	15.24
1996	13.35
1968	11.12
1955	10.14
1973	9.93
1964	9.92
1980	9.72
1942	9.37
1941	9.11
1977	8.98

Driest
Year	Precipitation, in
1976	1.38
2013	1.62
1944	1.90
1985	2.19
1988	2.37
1990	2.40
2011	2.51
1978	2.51
1984	2.56
1962	2.59

The hottest, coldest and wettest days

Hottest day: 62°F; 11 December 2025, 10 December 2025
Coldest night: 29°F; 30 December 2025
Wettest day: 2.10 in; 18 December 2025

Every month, season and year

Months

Seasons

Years

Portland, OR the day's answers

All-time records

Every answer in words

December 2025 brought 8.51 in of precipitation in Portland, OR, the wettest December since 2023, 13th wettest of 86.
The hottest day of December 2025 in Portland, OR: 62°F on Thursday 11 December 2025 and Wednesday 10 December 2025.
The coldest night of December 2025 in Portland, OR: a low of 29°F on Tuesday 30 December 2025.
The wettest day of December 2025 in Portland, OR: 2.10 in on Thursday 18 December 2025.