Boise, ID: December

31 December 2025: December 2025 averaged 41.6°F in Boise, ID, the warmest December since 1933, 3rd warmest of 148.

December 2025

Mean temperature: 41.6°F; Warmest since 1933; 3rd warmest of 148
Precipitation: 2.27 in; Wettest since 2024; 22nd wettest of 148

A normal December in Boise, ID (1991 to 2020): a mean temperature of 31.8°F, between 28.3°F and 36.4°F in eight years of ten and 1.34 in of precipitation, between 0.64 in and 3.26 in in eight years of ten.

The mean temperature of every December in Boise, ID since 1877: 41.6°F in 2025; the highest is 43.1°F, in 1917.

Normal range, 28.3 to 36.4°F

Every year, ranked, as a table

Every December in Boise, ID from 1875 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	41.6	3	50.1	1	33.1	3	2.27	22	0
2024	35.7	25	41.8	40	29.6	21	2.78	12	0
2023	36.3	18	42.5	28	30.1	16	1.51	62	0
2022	29.2	113	34.9	127	23.5	93	2.00	35	0
2021	34.1	48	41.3	50	26.9	52	1.54	61	0
2020	32.9	60	41	54	24.9	71	0.55	131	0
2019	36.1	22	41.8	40	30.5	11	1.06	90	0
2018	32.6	66	38.9	86	26.3	54	1.40	67	0
2017	28.6	119	34.7	129	22.5	104	1.02	93	0
2016	23.3	143	30.7	146	15.9	142	1.99	36	0
2015	31.8	74	37.5	103	26.1	57	1.71	52	0
2014	37.4	9	43.8	17	30.9	9	3.34	6	0
2013	23.9	139	31.4	143	16.4	138	0.66	122	0
2012	35.9	23	42.4	31	29.4	23	1.09	86	0
2011	31.3	83	41.5	46	21	122	0.36	143	0
2010	35	39	41.2	52	28.8	27	3.25	8	0
2009	26.7	134	33.5	134	20	128	1.76	47	0
2008	31.5	80	39.1	80	23.9	87	1.75	49	0
2007	32.4	69	38.5	91	26.3	54	1.27	75	0
2006	31.7	75	39.5	75	24	85	1.64	56	0
2005	29.5	110	36	119	23.1	99	3.34	6	0
2004	35.4	30	42	38	28.8	27	1.24	76	0
2003	37.2	11	44	12	30.4	12	1.62	58	0
2002	37.3	10	43.3	24	31.4	7	2.03	34	0
2001	30.7	96	36.3	118	25.1	67	1.15	80	0
2000	31	92	36.6	115	25.5	64	0.80	113	0
1999	31.9	73	37.5	103	26.3	54	0.90	103	0
1998	30.7	96	37.7	100	23.7	88	1.65	55	0
1997	31.1	89	39.2	79	23.1	99	0.65	124	0
1996	36.3	18	42.5	28	30	18	3.43	5	0
1995	33	57	39	84	27.1	51	2.19	28	0
1994	30.3	104	37.1	109	23.6	90	1.79	43	0
1993	33.3	54	41.6	44	25	69	0.98	99	0
1992	28.5	120	35.1	126	21.9	111	0.89	105	0
1991	31.6	76	40.3	65	23	101	0.35	144	0
1990	18.1	147	28.4	149	7.8	147	0.98	99	0
1989	30.4	102	40.8	57	19.9	130	0.10	147	0
1988	27	132	33.5	134	20.5	125	0.81	112	0
1987	32.8	63	41	54	24.7	74	1.05	91	0
1986	28	125	35.9	120	20	128	0.12	146	0
1985	12.6	148	21.4	150	3.7	148	1.24	76	0
1984	22.9	145	30.8	145	14.9	145	0.63	126	0
1983	23.2	144	30.5	147	15.9	142	4.23	2	0
1982	31.5	80	39.4	76	23.6	90	1.92	40	0
1981	35.3	33	42.8	27	27.8	42	2.72	14	0
1980	33	57	40.9	56	25.2	66	1.49	63	0
1979	35.8	24	43.9	13	27.6	46	0.74	117	0
1978	27	132	35.5	121	18.4	133	0.60	129	0
1977	37.2	11	43.5	19	31	8	2.46	17	0
1976	29.3	112	41.8	40	16.8	136	0.09	148	0
1975	31.4	82	37.2	107	25.6	63	1.29	72	0
1974	33.1	56	40.5	62	25.8	60	1.71	52	0
1973	38.4	6	44.4	9	32.4	5	2.23	25	0
1972	23.8	141	32.1	140	15.5	144	1.79	43	0
1971	30.2	106	36.7	113	23.7	88	1.63	57	0
1970	33.5	51	39.8	73	27.2	50	1.37	70	0
1969	34.6	43	41.3	50	27.9	39	1.77	45	0
1968	35.1	37	41.5	46	28.7	29	1.95	39	0
1967	27.8	128	35.4	122	20.2	127	0.50	135	0
1966	31.2	87	38	96	24.5	78	1.41	66	0
1965	30	109	37.6	101	22.5	104	0.61	127	0
1964	35.1	37	42.4	31	27.9	39	3.19	9	0
1963	28.1	124	34.2	131	22	109	1.02	93	0
1962	35.4	30	42.4	31	28.4	31	0.25	145	0
1961	30.8	94	37.1	109	24.6	76	0.90	103	0
1960	30.5	99	39.1	80	21.8	113	0.43	140	0
1959	27.9	126	39.1	80	16.7	137	0.53	134	0
1958	36.6	16	44.1	11	29.1	25	1.28	74	0
1957	34.4	44	40.7	58	28	37	2.08	32	0
1956	30.6	98	37.3	105	24	85	0.84	109	0
1955	35.3	33	41.8	40	28.9	26	2.22	26	0
1954	30.5	99	38.8	87	22.3	107	1.09	86	0
1953	31.3	83	38.4	93	24.1	84	1.15	80	0
1952	34	49	40.4	64	27.7	43	1.00	96	0
1951	27.5	129	34.1	132	20.8	123	2.47	16	0
1950	36.2	20	42.2	34	30.3	14	2.19	28	0
1949	31	92	38.7	90	23.4	95	0.68	121	0
1948	25.5	136	33.2	136	17.7	134	2.11	30	0
1947	31.3	83	38.5	91	24.2	82	0.66	122	0
1946	36.2	20	43.9	13	28.5	30	0.86	107	0
1945	30.8	94	38	96	23.6	90	2.24	24	0
1944	29	116	34.8	128	23.3	97	1.09	86	0
1943	32.8	63	40.7	58	24.9	71	0.41	141	0
1942	33.5	51	38.8	87	28.1	33	2.75	13	0
1941	35	39	42.1	36	27.9	39	1.77	45	0
1940	35.3	33	43.1	25	27.4	48	0.54	132	0
1939	40.2	4	47.7	5	32.6	4	1.39	68	0
1938	34.2	47	41.1	53	27.4	48	0.57	130	0
1937	37.5	8	44.3	10	30.7	10	2.10	31	0
1936	35.2	36	42.2	34	28.1	33	0.78	115	0
1935	29.1	115	34.7	129	23.4	95	1.00	96	0
1934	32.9	60	38.1	95	27.7	43	1.49	63	0
1933	42.4	2	49.4	4	35.4	2	1.10	85	0
1932	25.4	137	33.1	137	17.7	134	1.00	96	0
1931	28.7	118	35.3	123	22	109	1.83	42	0
1930	23.9	139	31.5	142	16.3	140	0.54	132	0
1929	37.6	7	45.2	7	30.1	16	1.17	79	0
1928	28.3	122	36.9	112	19.7	131	1.11	84	0
1927	27.9	126	35.3	123	20.6	124	0.61	127	0
1926	30.3	104	37.9	99	22.6	103	1.38	69	0
1925	35	39	40.2	67	29.9	19	1.03	92	0
1924	21.8	146	29.3	148	14.3	146	3.02	10	0
1923	31.6	76	38.8	87	24.5	78	0.79	114	0
1922	30.1	107	36.6	115	23.5	93	1.73	51	0
1921	32.9	60	40	70	25.8	60	0.88	106	0
1920	34.3	45	40.5	62	28.1	33	2.43	18	0
1919	23.6	142	31	144	16.2	141	1.20	78	0
1918	29.5	110	37.6	101	21.5	116	0.39	142	0
1917	43.1	1	49.8	2	36.5	1	2.33	20	0
1916	28.4	121	35.2	125	21.5	116	1.29	72	0
1915	33.6	50	41.4	48	25.9	59	1.56	59	0
1914	24	138	31.7	141	16.4	138	0.47	137	0
1913	28.9	117	36.7	113	21.1	120	2.40	19	0
1912	31.6	76	39	84	24.2	82	0.83	110	0
1911	31.1	89	38	96	24.3	81	0.78	115	0
1910	34.8	42	39.9	72	29.6	21	1.13	83	0
1909	27.5	129	33.1	137	21.8	113	1.55	60	0
1908	31.1	89	37.2	107	25	69	1.15	80	0
1907	36.7	15	43.1	25	30.4	12	2.81	11	0
1906	38.6	5	44.9	8	32.3	6	1.99	36	0
1905	27.5	129	33.7	133	21.4	118	0.85	108	0
1904	32.3	70	40.2	67	24.5	78	1.71	52	0
1903	32.2	72	39.4	76	24.9	71	0.74	117	0
1902	35.4	30	42.5	28	28.3	32	1.01	95	0
1901	35.7	25	43.4	21	28	37	1.76	47	0
1900	36.4	17	43.5	19	29.4	23	0.47	137	0
1899	30.1	107	37	111	23.2	98	0.82	111	0
1898	25.6	135	32.7	139	18.5	132	0.70	119	0
1897	32.6	66	40.6	60	24.7	74	2.30	21	0
1896	35.7	25	43.4	21	28.1	33	1.48	65	0
1895	30.5	99	39.1	80	21.9	111	0.69	120	0
1894	31.2	87	40.6	60	21.7	115	1.98	38	0
1893	34.3	45	42.1	36	26.5	53	0.48	136	0
1892	33.4	53	43.9	13	22.9	102	0.94	102	0
1891	28.3	122	36.4	117	20.3	126	1.90	41	0
1890	33	57	39.8	73	26.1	57	0.96	101	0
1889	32.8	63	40.1	69	25.5	64	2.04	33	0
1888	36.9	14	46.4	6	27.5	47	1.34	71	0
1887	32.3	70	40	70	24.6	76	1.74	50	0
1886	37	13	43.9	13	30.2	15	2.64	15	0
1885	35.7	25	43.8	17	27.7	43	1.07	89	0
1884	29.2	113	37.3	105	21.1	120	5.67	1	0
1883							2.27	22	31
1882	31.6	76	42	38	21.2	119	2.20	27	0
1881	33.2	55	41.4	48	25.1	67	0.65	124	0
1880	35.7	25	41.6	44	29.7	20	4.01	3	0
1879	32.5	68	39.3	78	25.7	62	3.65	4	0
1878	30.4	102	38.4	93	22.4	106	0.45	139	0
1877	31.3	83	40.3	65	22.3	107			0
1876			43.4	21					31
1875			49.6	3					31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1917	43.1
1933	42.4
2025	41.6
1939	40.2
1906	38.6
1973	38.4
1929	37.6
1937	37.5
2014	37.4
2002	37.3

Coldest
Year	Mean, °F
1985	12.6
1990	18.1
1924	21.8
1984	22.9
1983	23.2
2016	23.3
1919	23.6
1972	23.8
2013	23.9
1930	23.9

Wettest
Year	Precipitation, in
1884	5.67
1983	4.23
1880	4.01
1879	3.65
1996	3.43
2014	3.34
2005	3.34
2010	3.25
1964	3.19
1924	3.02

Driest
Year	Precipitation, in
1976	0.09
1989	0.10
1986	0.12
1962	0.25
1991	0.35
2011	0.36
1918	0.39
1943	0.41
1960	0.43
1878	0.45

The hottest, coldest and wettest days

Hottest day: 63°F; 11 December 2025
Coldest night: 20°F; 1 December 2025
Wettest day: 0.93 in; 21 December 2025

Every month, season and year

Months

Seasons

Years

Boise, ID the day's answers

All-time records

Every answer in words

December 2025 brought 2.27 in of precipitation in Boise, ID, the wettest December since 2024, tied 22nd wettest of 148 (with 1883).
The hottest day of December 2025 in Boise, ID: 63°F on Thursday 11 December 2025.
The coldest night of December 2025 in Boise, ID: a low of 20°F on Monday 1 December 2025.
The wettest day of December 2025 in Boise, ID: 0.93 in on Sunday 21 December 2025.