Deer Lodge, MT: September

30 September 2025: September 2025 averaged 57.8°F in Deer Lodge, MT, the warmest September since 1967 (1984 excluded: 4 of 30 days missing; 1986 excluded: 11 of 30 days missing; 1991 excluded: 5 of 30 days missing; 12 more years excluded for missing days), 4th warmest of 95.

September 2025

Mean temperature: 57.8°F; Warmest since 1967; 4th warmest of 95
Precipitation: 0.36 in; Driest since 2021; 23rd driest of 89

The mean temperature of every September in Deer Lodge, MT since 1899: 57.8°F in 2025; the highest is 59.7°F, in 1938.

Every year, ranked, as a table

Every September in Deer Lodge, MT from 1893 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	57.8	4	78.3	3	37.2	23	0.36	67	0
2024	55.3	18	74.3	17	36.4	37	0.64	52	0
2023	53.7	35	70.9	38	36.4	37	1.06	36	0
2022	56.8	8	76	8	37.6	20	1.23	30	0
2021	53.9	33	74.6	14	33.2	69	0.14	83	0
2020	54.3	28	73.8	22	34.7	60	0.67	51	0
2019	52.6	53	66.5	78	38.6	11	2.11	9	0
2018	50.1	78	66.8	74	33.1	70	0.63	53	1
2016	46.4	92	64.1	90	28.6	96			0
2015	53	48	70.2	46	35.9	48			0
2014	52.4	55	69.6	52	35.2	55			1
2013	54.7	23	69	59	40.4	4			0
2009	57.3	5	77.9	5	36.8	30	0.41	64	0
2008	50.3	75	68	68	32.5	79			0
2007	51.8	62	70.3	44	32.7	74	1.18	33	1
2006	53.7	35	72.2	33	35	57	1.45	25	2
2005			70.8	40			1.19	32	9
2004	52.7	52	68.5	63	36.9	28	1.72	16	0
2003							0.18	76	13
2002									12
2001									14
2000									16
1999									10
1998									13
1997	48.3	88	66.3	79	29.9	93			3
1996	49	85	66.2	81	31.7	85	1.56	21	0
1995	49.7	83	70.4	42	28.9	95	4.34	1	0
1994	54.7	23	77	7	32.3	81	0.00	89	1
1993	49.5	84	69.3	55	29.6	94	0.53	58	0
1991					35.4	54			5
1990	57.1	7	78.6	2	35.5	52	0.30	71	0
1989	51.3	70	69.9	50	32.6	76	0.14	83	0
1988	50.1	78	68.6	62	31.5	89	0.17	77	0
1987	52.4	55	72.8	28	32	83	0.15	81	0
1986									11
1985	45.5	94	58.8	96	32.1	82	3.24	3	0
1984			62.1	93			0.95	40	4
1983	47.8	90	64.5	89	31.1	90	0.84	43	3
1982	51.3	70	68.7	61	34	65	1.78	14	1
1981	53.4	40	73.4	25	33.4	68	0.84	43	0
1980	53.5	39	70	48	37	26	1.73	15	0
1979	55.6	13	77.1	6	34.1	64	0.05	87	0
1978	53.1	47	69.5	54	36.6	32	1.82	12	0
1977	51.7	65	68.3	65	35.1	56	2.71	6	0
1976	54.2	29	74	20	34.3	62	1.43	27	0
1975	51.8	62	72.9	27	30.6	92	0.51	60	0
1974	52	61	71.3	37	32.6	76	0.47	61	0
1973	51.6	66	66.7	75	36.4	37	1.15	34	0
1972	50.3	75	68	68	32.6	76	0.81	47	0
1971	49	85	65.3	86	32.8	72	1.04	38	0
1970	48.2	89	64.6	88	31.7	85	0.75	49	0
1969	53.6	37	72.7	29	34.4	61	0.60	56	0
1968	51.6	66	66.3	79	36.9	28	2.70	7	0
1967	58.7	2	79.2	1	38.2	16	0.17	77	0
1966	56.8	8	75	13	38.8	9	0.16	80	1
1965	43.5	95	55.9	97	31.1	90	3.27	2	0
1964	50.8	72	69.3	55	32.4	80	0.15	81	0
1963	57.3	5	75.6	9	39	8	1.44	26	0
1962	53.3	41	70.4	42	36.2	44	0.41	64	0
1961	46.4	92	61.2	95	31.8	84	1.82	12	1
1960	54	32	74.2	18	33.7	67	0.17	77	0
1959	50.8	72	65.6	84	36	46	1.52	22	0
1958	53.8	34	68.8	60	38.5	13	0.31	69	1
1957	54.6	26	72.6	31	36.5	35	0.35	68	1
1956	54.1	30	72.4	32	35.6	50	0.39	66	1
1955	52.2	60	67.5	72	36.8	30	0.30	71	0
1954	53.3	41	70	48	36.6	32	0.61	55	0
1953	56.5	11	74.4	16	38.6	11	0.73	50	0
1952	55.4	15	74.5	15	36.3	43	0.85	42	0
1951	51.6	66	66.2	81	37	26	2.04	10	0
1950	51.4	69	66.7	75	36	46	0.82	46	0
1949	54.1	30	70.9	38	37.3	21			0
1948	51.8	62	70.3	44	32.7	74	0.05	87	2
1947	53.3	41	69.9	50	36.6	32	2.79	5	0
1946	53.6	37	70.1	47	37.2	23	1.71	17	0
1945	52.8	51	69.1	58	36.5	35	1.15	34	0
1944	55.5	14	72.7	29	38.3	15	0.63	53	0
1943	55.4	15	75.1	12	35.7	49	0.22	74	0
1942	55.1	21	72	34	38.5	13	0.21	75	1
1941	49.8	82	61.4	94	38.1	18	1.67	19	0
1940	58.4	3	73.1	26	44	1	1.49	24	1
1939	54.9	22	71.9	35	37.9	19	1.21	31	0
1938	59.7	1	78.1	4	41.3	2	0.25	73	0
1937	55.4	15	70.8	40	40	5	1.66	20	0
1936	52.3	57	68.5	63	36.2	44	1.06	36	0
1935	55.3	18	74.2	18	36.4	37	0.10	86	0
1934	50.2	77	64.9	87	35.5	52	0.52	59	0
1933	52.5	54	67.8	71	37.2	23	0.44	62	0
1932	53	48	71.8	36	34.2	63	0.12	85	0
1931	53.2	45	66.9	73	39.4	6	1.32	29	0
1930	55.3	18	69.6	52	40.9	3	1.94	11	0
1929	47.7	91	63.8	91	31.7	85	1.02	39	1
1923	54.7	23	73.6	23	36.4	37	0.44	62	3
1922	56.7	10	75.2	11	38.2	16	1.41	28	0
1921	48.5	87	63.4	92	33.9	66	0.86	41	2
1920	53.3	41	68	68	38.7	10	0.84	43	0
1919	53.2	45	73.6	23	32.8	72			0
1918	52.3	57	68.3	65	36.4	37	2.57	8	2
1917	56	12	74	20	37.3	21	1.52	22	1
1916	50.1	78	65.4	85	34.8	59	0.79	48	0
1913							0.58	57	30
1912							1.71	17	30
1905							0.31	69	30
1904	52.3	57	69.3	55	35.6	50			1
1903	50.5	74	65.9	83	35	57			0
1902	50	81	68.3	65	31.6	88			0
1901	52.9	50	66.6	77	39.2	7	3.00	4	3
1899	54.4	27	75.6	9	33.1	70			0
1893									19

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1938	59.7
1967	58.7
1940	58.4
2025	57.8
2009	57.3
1963	57.3
1990	57.1
2022	56.8
1966	56.8
1922	56.7

Coldest
Year	Mean, °F
1965	43.5
1985	45.5
2016	46.4
1961	46.4
1929	47.7
1983	47.8
1970	48.2
1997	48.3
1921	48.5
1996	49
More years share the last value

Wettest
Year	Precipitation, in
1995	4.34
1965	3.27
1985	3.24
1901	3.00
1947	2.79
1977	2.71
1968	2.70
1918	2.57
2019	2.11
1951	2.04

Driest
Year	Precipitation, in
1994	0.00
1979	0.05
1948	0.05
1935	0.10
1932	0.12
2021	0.14
1989	0.14
1987	0.15
1964	0.15
1966	0.16

The hottest, coldest and wettest days

Hottest day: 90°F; 4 September 2025, 3 September 2025
Coldest night: 26°F; 24 September 2025, 23 September 2025
Wettest day: 0.12 in; 15 September 2025

Every month, season and year

Months

Seasons

Years

Deer Lodge, MT the day's answers

All-time records

Every answer in words

September 2025 brought 0.36 in of precipitation in Deer Lodge, MT, the driest September since 2021, 23rd driest of 89.
The hottest day of September 2025 in Deer Lodge, MT: 90°F on Thursday 4 September 2025 and Wednesday 3 September 2025.
The coldest night of September 2025 in Deer Lodge, MT: a low of 26°F on Wednesday 24 September 2025 and Tuesday 23 September 2025.
The wettest day of September 2025 in Deer Lodge, MT: 0.12 in on Monday 15 September 2025.