Boise, ID: January

31 January 2026: January 2026 averaged 33.6°F in Boise, ID, the warmest January since 2021, tied 40th warmest of 149 (with 2016 and 1905).

January 2026

Mean temperature: 33.6°F; Warmest since 2021; 40th warmest of 149
Precipitation: 0.73 in; Driest since 2023; 20th driest of 149

A normal January in Boise, ID (1991 to 2020): a mean temperature of 32.6°F, between 24.7°F and 37.5°F in eight years of ten and 1.35 in of precipitation, between 0.77 in and 2.72 in in eight years of ten.

The mean temperature of every January in Boise, ID since 1878: 33.6°F in 2026; the highest is 41°F, in 1953.

Normal range, 24.7 to 37.5°F

Every year, ranked, as a table

Every January in Boise, ID from 1875 to 2026, 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
2026	33.6	40	40.5	48	26.7	41	0.73	129	0
2025	31.5	71	39.9	53	23	84	1.07	104	0
2024	33.2	46	40.7	47	25.7	54	2.23	28	0
2023	33.5	43	40.8	45	26.3	46	0.71	131	0
2022	28.9	96	34.9	106	22.9	85	1.08	101	0
2021	36.4	14	43.6	13	29.2	16	1.24	87	0
2020	37.5	8	44.1	9	30.9	7	2.29	25	0
2019	35.3	25	43.8	11	26.8	39	1.08	101	0
2018	37.8	6	45.4	5	30.2	11	1.36	74	0
2017	21.3	136	28.4	141	14.3	131	2.96	8	0
2016	33.6	40	40.2	51	26.9	38	0.83	121	0
2015	31.7	68	37.5	82	25.9	52	0.83	121	0
2014	30.5	80	36.2	97	24.9	65	0.81	124	0
2013	19.6	142	27.2	145	12	140	1.21	90	0
2012	34.8	28	43.2	19	26.5	42	2.72	15	0
2011	31.7	68	38.9	66	24.5	68	1.33	78	0
2010	37.4	9	43.2	19	31.5	5	1.38	71	0
2009	31.3	74	36.8	91	25.7	54	0.87	118	0
2008	29	93	35.5	101	22.5	88	0.94	113	0
2007	29.2	91	37.8	76	20.6	102	0.18	148	0
2006	36.4	14	42.6	25	30.2	11	1.76	43	0
2005	32.8	53	39	64	26.5	42	0.23	146	0
2004	28.4	99	33.6	118	23.2	81	1.85	41	0
2003	38.7	5	44.8	6	32.5	3	1.56	53	0
2002	31.5	71	37.6	81	25.5	58	0.94	113	0
2001	27.2	107	33.5	119	20.8	98	1.07	104	0
2000	34.1	34	40.8	45	27.5	32	1.51	60	0
1999	35.3	25	42.3	29	28.3	24	1.40	69	0
1998	38.9	4	46.2	4	31.5	5	2.73	14	0
1997	32.1	62	39.3	62	24.9	65	2.74	13	0
1996	32.5	58	39	64	26	50	1.36	74	0
1995	36.2	16	43.3	18	29.1	18	2.10	33	0
1994	32.7	55	38.4	69	27	37	1.28	84	0
1993	24.7	120	31.4	130	18.1	111	1.65	48	0
1992	33.1	48	41.7	37	24.5	68	0.36	145	0
1991	24.4	122	33.3	121	15.5	126	0.96	112	0
1990	34.1	34	42	32	26.3	46	0.84	120	0
1989	24.7	120	33.4	120	16	122	1.14	94	0
1988	26.1	111	34.6	109	17.5	112	1.30	82	0
1987	27.7	104	36.3	96	19.2	108	0.73	129	0
1986	29.4	88	37.8	76	20.9	97	0.98	110	0
1985	19.1	143	26.9	146	11.3	143	0.20	147	0
1984	21.2	137	27.4	144	15	129	0.80	127	0
1983	35.8	21	43.4	17	28.3	24	1.67	46	0
1982	24.8	118	33.3	121	16.4	116	1.42	67	0
1981	33.9	38	39.5	60	28.2	27	1.20	91	0
1980	30.3	82	37.3	85	23.2	81	1.56	53	0
1979	16.2	147	25.3	150	7.1	147	1.93	38	0
1978	37	10	43.5	15	30.5	10	2.37	22	0
1977	19	144	26.1	148	11.9	141	0.65	134	0
1976	32.1	62	38.8	67	25.5	58	1.49	64	0
1975	28.2	100	36.1	98	20.3	106	0.59	137	0
1974	29.3	90	36.1	98	22.6	87	1.35	76	0
1973	30.7	78	38.2	72	23.2	81	1.14	94	0
1972	30.9	76	37.7	78	24.1	75	2.15	31	0
1971	33.9	38	39.8	56	28	29	2.04	34	0
1970	36.2	16	41.6	39	30.7	9	3.87	2	0
1969	34.3	33	41.3	41	27.3	35	3.50	6	0
1968	29.5	87	37.5	82	21.4	94	0.43	141	0
1967	36.2	16	42.9	22	29.5	13	1.49	64	0
1966	32.4	59	39.9	53	24.9	65	0.81	124	0
1965	34.1	34	39.1	63	29.1	18	2.89	10	0
1964	26	113	33.8	114	18.2	110	2.46	21	0
1963	23.3	127	32	126	14.5	130	1.13	96	0
1962	21.1	138	28	142	14.2	132	1.00	109	0
1961	32.9	52	42.5	27	23.3	80	0.42	142	0
1960	23.9	124	32.5	125	15.4	127	1.33	78	0
1959	35.8	21	42.9	22	28.7	23	1.33	78	0
1958	31.5	71	37.9	74	25	63	1.37	72	0
1957	21.5	134	30	139	12.9	136	1.04	108	0
1956	33.5	43	40.5	48	26.4	44	2.17	30	0
1955	23.5	126	30.6	133	16.4	116	1.32	81	0
1954	36.5	12	44.1	9	28.9	20	1.09	98	0
1953	41	1	47.8	1	34.2	1	3.35	7	0
1952	26.6	109	33.7	115	19.5	107	1.24	87	0
1951	29	93	35.9	100	22.2	91	1.66	47	0
1950	25.3	116	33.2	123	17.5	112	2.53	16	0
1949	10.3	149	20.1	152	0.5	149	0.12	149	0
1948	33	50	41.8	34	24.2	72	0.81	124	0
1947	23.3	127	32.6	124	13.9	133	0.50	139	0
1946	29	93	36.9	89	21.1	96	1.37	72	0
1945	32.1	62	37.9	74	26.4	44	1.09	98	0
1944	25	117	34	112	16.1	119	0.41	143	0
1943	28.2	100	35.5	101	20.8	98	1.27	85	0
1942	20.8	140	28.7	140	12.8	138	0.98	110	0
1941	33.2	46	40.2	51	26.3	46	1.23	89	0
1940	33	50	39.8	56	26.3	46	1.84	42	0
1939	34	37	41.2	42	26.8	39	1.19	92	0
1938	35.9	20	42.6	25	29.2	16	1.51	60	0
1937	15.4	148	23.7	151	7	148	1.60	51	0
1936	31.6	70	37.5	82	25.6	57	2.13	32	0
1935	30.9	76	37.7	78	24.2	72	0.76	128	0
1934	39.7	2	46.7	2	32.8	2	1.29	83	0
1933	31.8	65	38.3	71	25.2	61	1.08	101	0
1932	27.2	107	33.7	115	20.7	100	1.09	98	0
1931	30.1	84	36.9	89	23.4	79	0.88	117	0
1930	17.9	145	25.5	149	10.3	144	2.18	29	0
1929	23.1	130	30.5	135	15.7	125	2.49	19	0
1928	29.4	88	35.2	104	23.5	78	1.96	37	0
1927	31.8	65	38.6	68	25	63	2.27	26	0
1926	30.4	81	37	88	23.8	77	0.70	132	0
1925	32.6	56	39.4	61	25.9	52	2.00	36	0
1924	23.6	125	31.1	131	16.1	119	0.40	144	0
1923	35.5	24	42.8	24	28.2	27	1.62	49	0
1922	20.7	141	28	142	13.3	135	0.90	115	0
1921	34.7	30	42.1	31	27.4	33	1.57	52	0
1920	30.1	84	38	73	22.2	91	0.66	133	0
1919	32.8	53	41.4	40	24.2	72	0.85	119	0
1918	34.4	31	40.9	43	28	29	2.27	26	0
1917	23.2	129	30.1	138	16.2	118	1.10	97	0
1916	27.4	106	34.1	111	20.6	102	1.93	38	0
1915	27.6	105	34.7	107	20.5	104	1.06	106	0
1914	37.8	6	44.8	6	30.8	8	1.06	106	0
1913	28	102	34.7	107	21.2	95	1.34	77	0
1912	28.8	97	35.5	101	22.1	93	2.53	16	0
1911	33.5	43	40.9	43	26	50	2.32	24	0
1910	24.2	123	31.8	127	16.6	115	1.55	56	0
1909	36.5	12	43.6	13	29.3	14	4.33	1	0
1908	35.3	25	41.7	37	28.9	20	0.57	138	0
1907	30.3	82	36.6	94	24	76	1.45	66	0
1906	30.6	79	36.8	91	24.5	68	2.02	35	0
1905	33.6	40	39.8	56	27.4	33	1.50	62	0
1904	32.6	56	39.9	53	25.4	60	0.83	121	0
1903	32.2	61	37.1	87	27.3	35	2.52	18	0
1902	28.5	98	36.6	94	20.4	105	0.63	135	0
1901	34.8	28	41.8	34	27.8	31	1.56	53	0
1900	36.8	11	44.6	8	28.9	20	1.54	57	0
1899	35.8	21	42.2	30	29.3	14	1.89	40	0
1898	22.3	131	31.7	128	12.9	136	1.40	69	0
1897	29.9	86	37.3	85	22.5	88	1.17	93	0
1896	33.1	48	41.9	33	24.4	71	3.72	3	0
1895	31	75	39.6	59	22.5	88	2.48	20	0
1894	32.3	60	41.8	34	22.7	86	2.88	11	0
1893	26.5	110	37.7	78	15.3	128	0.62	136	0
1892	22.2	132	30.7	132	13.7	134	1.53	59	0
1891	26.1	111	31.5	129	20.7	100	1.75	44	0
1890	21.5	134	30.5	135	12.4	139	1.26	86	0
1889	21.1	138	30.6	133	11.5	142	0.44	140	0
1888	17.5	146	26.8	147	8.1	146	1.54	57	0
1887	36	19	43.7	12	28.3	24	2.81	12	0
1886	27.9	103	36.8	91	19	109	2.96	8	0
1885	24.8	118	33.7	115	15.8	123	1.50	62	0
1884	29.1	92	42.4	28	15.8	123	1.75	44	0
1883	22	133	33.9	113	10.1	145	3.71	4	0
1882	25.5	115	34.3	110	16.7	114	1.62	49	0
1881	31.8	65	38.4	69	25.2	61	3.62	5	0
1880	39.3	3	46.5	3	32.1	4	0.90	115	0
1879	25.6	114	35.2	104	16.1	119	2.36	23	0
1878	34.4	31	43.1	21	25.7	54	1.42	67	0
1877			43.5	15					31
1876			40.5	48					31
1875			30.3	137					31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1953	41
1934	39.7
1880	39.3
1998	38.9
2003	38.7
2018	37.8
1914	37.8
2020	37.5
2010	37.4
1978	37

Coldest
Year	Mean, °F
1949	10.3
1937	15.4
1979	16.2
1888	17.5
1930	17.9
1977	19
1985	19.1
2013	19.6
1922	20.7
1942	20.8

Wettest
Year	Precipitation, in
1909	4.33
1970	3.87
1896	3.72
1883	3.71
1881	3.62
1969	3.50
1953	3.35
2017	2.96
1886	2.96
1965	2.89

Driest
Year	Precipitation, in
1949	0.12
2007	0.18
1985	0.20
2005	0.23
1992	0.36
1924	0.40
1944	0.41
1961	0.42
1968	0.43
1889	0.44

The hottest, coldest and wettest days

Hottest day: 59°F; 3 January 2026
Coldest night: 15°F; 25 January 2026, 24 January 2026
Wettest day: 0.24 in; 1 January 2026

Every month, season and year

Months

Seasons

Years

Boise, ID the day's answers

All-time records

Every answer in words

January 2026 brought 0.73 in of precipitation in Boise, ID, the driest January since 2023, tied 20th driest of 149 (with 1987).
The hottest day of January 2026 in Boise, ID: 59°F on Saturday 3 January 2026.
The coldest night of January 2026 in Boise, ID: a low of 15°F on Sunday 25 January 2026 and Saturday 24 January 2026.
The wettest day of January 2026 in Boise, ID: 0.24 in on Thursday 1 January 2026.