Helena, MT: December

31 December 2025: December 2025 averaged 34°F in Helena, MT, the warmest December since 2024, 4th warmest of 146.

December 2025

Mean temperature: 34°F; Warmest since 2024; 4th warmest of 146
Precipitation: 0.86 in; Wettest since 2021; 32nd wettest of 146

A normal December in Helena, MT (1991 to 2020): a mean temperature of 24.5°F, between 16.1°F and 29.5°F in eight years of ten and 0.32 in of precipitation, between 0.05 in and 0.82 in in eight years of ten.

The mean temperature of every December in Helena, MT since 1880: 34°F in 2025; the highest is 35.9°F, in 1896.

Normal range, 16.1 to 29.5°F

Every year, ranked, as a table

Every December in Helena, MT from 1880 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	34	4	44.1	2	23.9	7	0.86	32	0
2024	35.2	2	44.2	1	26.2	3	0.30	104	0
2023	32	8	41.6	4	22.4	15	0.03	142	0
2022	18.2	119	27.7	118	8.8	119	0.69	49	0
2021	25.3	66	35.3	51	15.3	82	0.98	25	0
2020	30.7	12	40.6	7	20.7	24	0.21	120	0
2019	30	16	38.7	15	21.4	20	0.04	139	0
2018	28	37	37	28	19.1	40	0.16	125	0
2017	18	122	26.2	125	9.7	114	1.83	5	0
2016	15	132	24.3	135	5.8	129	1.28	11	0
2015	23.9	85	32.3	89	15.5	81	0.74	48	0
2014	25.9	60	34.6	61	17.3	60	0.81	36	0
2013	23.9	85	33.2	80	14.5	89	0.29	106	0
2012	24.7	71	33.3	78	16	72	0.87	31	0
2011	26	58	36.4	39	15.6	80	0.07	135	0
2010	18.1	120	27.3	119	8.9	117	0.76	43	0
2009	10.8	143	19.7	142	1.9	142	0.31	100	0
2008	20	110	29.2	113	10.7	112	0.77	40	0
2007	27.8	41	36.8	31	18.8	46	0.01	143	0
2006	27	50	36.3	42	17.6	58	0.38	84	0
2005	19.8	113	28.5	115	11.2	109	0.63	51	0
2004	29.5	20	39.3	13	19.7	36	0.36	90	0
2003	28.3	32	37.1	27	19.5	38	0.35	92	0
2002	28	37	36.1	44	20	34	0.05	138	0
2001	24.5	75	33.3	78	15.7	78	0.28	109	0
2000	16.2	127	25.5	128	6.9	126	0.23	117	0
1999	28	37	37.2	26	18.9	43	0.10	134	0
1998	24.5	75	34.1	70	14.8	85	0.14	128	0
1997	24.4	78	35.1	54	13.6	95	0.01	143	0
1996	16.6	126	26.5	124	6.7	128	0.61	56	0
1995	22.7	98	33.8	74	11.6	108	0.32	98	0
1994	23.5	91	34.3	66	12.8	103	0.07	135	0
1993	29.9	17	39.7	12	20.2	31	0.13	130	0
1992	14.7	135	25.1	130	4.2	136	0.57	65	0
1991	22.9	97	32.7	84	13.1	101	0.79	38	0
1990	14	137	25.7	127	2.3	141	0.47	74	0
1989	23.8	88	34	72	13.6	95	0.48	72	0
1988	23	93	33.4	76	12.7	104	0.32	98	0
1987	24.7	71	34.8	58	14.5	89	0.42	78	0
1986	18.6	117	29.9	109	7.3	124	0.38	84	0
1985	15	132	24.4	134	5.6	131	0.35	92	0
1984	11.5	142	21.9	141	1.2	143	0.41	80	0
1983	5.5	146	14.9	144	-4	146	0.76	43	0
1982	22.6	100	31.2	100	14.1	92	1.05	19	0
1981	25.2	68	34.3	66	16.2	69	0.33	97	0
1980	26.9	51	37.8	25	16	72	0.40	81	0
1979	28.1	35	40.3	10	16	72	0.59	61	0
1978	15.2	131	24.8	131	5.6	131	0.76	43	0
1977	20.7	107	30.6	104	10.7	112	1.48	9	0
1976	28.6	26	38.4	19	18.9	43	0.04	139	0
1975	26	58	34.3	66	17.7	55	0.31	100	0
1974	27.7	43	36.9	29	18.5	50	0.26	114	0
1973	28.1	35	35.9	46	20.4	27	0.63	51	0
1972	13.6	138	22.8	138	4.4	135	0.46	75	0
1971	15.6	130	26.6	123	4.6	134	1.02	21	0
1970	20.5	109	30.3	106	10.8	110	0.54	69	0
1969	25.9	60	35.6	49	16.1	70	0.31	100	0
1968	16.7	125	26.1	126	7.3	124	0.75	46	0
1967	19	115	29.8	110	8.2	120	1.39	10	0
1966	27.4	47	36.9	29	17.9	53	0.62	54	0
1965	27.5	46	38.1	22	16.8	64	0.15	127	0
1964	19.1	114	31.3	99	6.9	126	0.99	24	0
1963	16.9	124	28.1	116	5.7	130	1.27	12	0
1962	29.2	22	38	24	20.3	30	0.14	128	0
1961	22.5	101	31.5	97	13.6	95	0.55	68	0
1960	23.9	85	34.5	64	13.3	99	0.34	95	0
1959	28.9	24	38.7	15	19.1	40	0.28	109	0
1958	24.4	78	34.1	70	14.6	87	1.01	23	0
1957	32.6	7	41.4	6	23.7	8	0.31	100	0
1956	28	37	38.3	20	17.7	55	0.46	75	0
1955	18.8	116	28.7	114	8.9	117	1.13	13	0
1954	23	93	33	82	12.9	102	0.13	130	0
1953	31.4	10	40.6	7	22.1	17	0.42	78	0
1952	22.5	101	31.9	92	13.2	100	0.28	109	0
1951	14.5	136	24.7	132	4.2	136	1.08	18	0
1950	26.5	55	36	45	16.9	63	0.61	56	0
1949	20	110	31.9	92	8.2	120	0.37	87	0
1948	12.8	140	22.9	137	2.7	140	0.80	37	0
1947	26.8	54	35	55	18.6	47	0.27	113	0
1946	26.2	57	35.7	47	16.7	65	0.94	28	0
1945	21.3	106	30.8	103	11.8	107	0.60	59	0
1944	16	129	27.2	120	4.8	133	0.37	87	0
1943	23.2	92	34.2	69	12.3	106	0.19	122	0
1942	27.7	43	36.4	39	19	42	0.29	106	0
1941	24.5	75	34.4	65	14.6	87	0.77	40	0
1940	28.7	25	38.5	17	18.9	43	0.04	139	0
1939	33.6	5	41.5	5	25.8	4	0.34	95	0
1938	28.5	27	36.6	35	20.4	27	0.23	117	0
1937	28.2	34	35.7	47	20.6	25	1.50	8	0
1936	27.2	49	34.8	58	19.7	36	0.69	49	0
1935	27.8	41	34.9	57	20.8	23	trace	145	0
1934	22.5	101	29.4	112	15.7	78	0.89	30	0
1933	30.2	14	38.5	17	21.9	18	0.60	59	0
1932	18.1	120	25.4	129	10.8	110	0.79	38	0
1931	25.7	62	33.4	76	18.1	52	0.16	125	0
1930	29.5	20	36.4	39	22.5	14	trace	145	0
1929	26.3	56	35.3	51	17.2	61	2.58	3	0
1928	23.7	90	32.7	84	14.7	86	0.94	28	0
1927	11.6	141	19.3	143	3.9	139	0.85	34	0
1926	24.7	71	32.2	90	17.2	61	0.50	71	0
1925	34.2	3	40.4	9	28	2	1.13	13	0
1924	13.5	139	22.7	139	4.2	136	0.61	56	0
1923	24.8	70	32.9	83	16.6	66	0.56	66	0
1922	18.3	118	27.1	122	9.4	116	1.10	17	0
1921	21.9	105	29.7	111	14.1	92	1.13	13	0
1920	28.3	32	35.4	50	21.2	21	0.24	116	0
1919	16.1	128	24.6	133	7.6	122	0.98	25	0
1918	28.5	27	36.5	37	20.5	26	0.07	135	0
1917	24.2	81	34.6	61	13.7	94	3.28	2	0
1916	17	123	24.2	136	9.7	114	1.03	20	0
1915	27.7	43	35.2	53	20.2	31	0.86	32	0
1914	20	110	27.2	120	12.7	104	0.25	115	0
1913	24.3	80	32.6	86	15.9	75	0.11	132	0
1912	30.5	13	38.1	22	22.8	13	0.37	87	0
1911	23	93	30.1	107	15.8	77	0.30	104	0
1910	24.2	81	31.8	94	16.6	66	0.17	124	0
1909	15	132	22.6	140	7.5	123	0.59	61	0
1908	25.7	62	33.5	75	17.9	53	0.52	70	0
1907	28.5	27	36.7	33	20.4	27	0.23	117	0
1906	25.3	66	33.1	81	17.5	59	1.96	4	0
1905	24.7	71	31.7	96	17.7	55	0.11	132	0
1904	29	23	36.7	33	21.2	21	0.39	83	0
1903	29.9	17	36.5	37	23.3	11	0.36	90	0
1902	22.1	104	30	108	14.2	91	0.75	46	0
1901	26.9	51	33.9	73	19.9	35	1.71	6	0
1900	32.7	6	39.9	11	25.6	5	0.43	77	0
1899	25.6	64	32.5	87	18.6	47	0.62	54	0
1898	20.7	107	28	117	13.4	98	0.28	109	0
1897	23.8	88	31.4	98	16.1	70	0.59	61	0
1896	35.9	1	41.8	3	30	1	0.35	92	0
1895	24.2	81	32.5	87	15.9	75	1.12	16	0
1894	24.2	81	32	91	16.3	68	0.63	51	0
1893	31.3	11	38.3	20	24.4	6	0.58	64	0
1892	25.6	64	31	101	20.1	33	0.56	66	1
1891	28.5	27	34.7	60	22.3	16	0.40	81	0
1890	30.1	15	36.8	31	23.5	10	0.82	35	0
1889	22.7	98	30.5	105	14.9	83	0.18	123	0
1888	25	69	31.8	94	18.2	51	0.77	40	0
1887	23	93	31	101	14.9	83	0.29	106	0
1886	27.4	47	36.2	43	18.6	47	0.98	25	0
1885	31.5	9	39.3	13	23.7	8	0.21	120	0
1884	7.5	144	14.5	145	0.5	144	1.56	7	0
1883	28.5	27	35	55	21.9	18	1.02	21	0
1882	26.9	51	34.6	61	19.2	39	0.48	72	0
1881	29.8	19	36.6	35	23.1	12	0.38	84	0
1880	7.3	145	14.4	146	0.2	145	4.64	1	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1896	35.9
2024	35.2
1925	34.2
2025	34
1939	33.6
1900	32.7
1957	32.6
2023	32
1885	31.5
1953	31.4

Coldest
Year	Mean, °F
1983	5.5
1880	7.3
1884	7.5
2009	10.8
1984	11.5
1927	11.6
1948	12.8
1924	13.5
1972	13.6
1990	14

Wettest
Year	Precipitation, in
1880	4.64
1917	3.28
1929	2.58
1906	1.96
2017	1.83
1901	1.71
1884	1.56
1937	1.50
1977	1.48
1967	1.39

Driest
Year	Precipitation, in
1935	trace
1930	trace
2007	0.01
1997	0.01
2023	0.03
2019	0.04
1976	0.04
1940	0.04
2002	0.05
2011	0.07
More years share the last value

The hottest, coldest and wettest days

Hottest day: 61°F; 10 December 2025
Coldest night: -6°F; 28 December 2025
Wettest day: 0.23 in; 17 December 2025

Every month, season and year

Months

Seasons

Years

Helena, MT the day's answers

All-time records

Every answer in words

December 2025 brought 0.86 in of precipitation in Helena, MT, the wettest December since 2021, tied 32nd wettest of 146 (with 1915).
The hottest day of December 2025 in Helena, MT: 61°F on Wednesday 10 December 2025.
The coldest night of December 2025 in Helena, MT: a low of -6°F on Sunday 28 December 2025.
The wettest day of December 2025 in Helena, MT: 0.23 in on Wednesday 17 December 2025.