Great Falls, MT: Summer

31 August 2026: Summer 2026 averaged 65.4°F in Great Falls, MT, the coldest summer since 2020, tied 51st coldest of 133 (with 1978 and 1903).

Summer 2026

Mean temperature: 65.4°F; Coldest since 2020; 51st coldest of 133
Precipitation: 6.65 in; Wettest since 2014; 35th wettest of 134

A normal summer in Great Falls, MT (1991 to 2020): a mean temperature of 65.1°F, between 62.9°F and 67.9°F in eight years of ten and 5.11 in of precipitation, between 2.25 in and 8.67 in in eight years of ten.

The mean temperature of every summer in Great Falls, MT since 1894: 65.4°F in 2026; the lowest is 58.4°F, in 1993.

Normal range, 62.9 to 67.9°F

Every year, ranked, as a table

Every summer in Great Falls, MT from 1892 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	65.4	81	80.3	61	50.6	96	6.65	35	0
2025	65.8	68	81.1	49	50.6	96	3.83	91	0
2024	65.6	72	82	39	49.2	117	3.90	90	0
2023	66	63	81.4	44	50.6	96	4.64	78	0
2022	67.7	20	84.3	13	51.1	74	3.52	101	0
2021	68.3	13	84.7	10	51.8	57	2.95	112	0
2020	65.3	84	80.9	52	49.6	113	5.43	61	0
2019	64.4	106	79.9	69	48.9	123	3.77	94	0
2018	65.3	84	79.7	71	50.8	86	4.09	88	0
2017	67.4	26	84.1	14	50.8	86	2.24	127	0
2016	65.1	89	81.7	41	48.4	128	3.28	106	0
2015	67.1	28	83.3	19	50.8	86	2.25	126	0
2014	65.1	89	79.2	83	51	79	9.35	9	0
2013	66.5	42	82.7	28	50.3	104	3.80	93	0
2012	67.9	17	84.8	8	51	79	3.44	103	0
2011	64.8	95	80.7	57	48.9	123	3.81	92	0
2010	62.9	128	77.1	114	48.7	126	5.88	50	0
2009	63.4	121	77.8	106	49	122	6.10	47	0
2008	64.9	94	80.5	60	49.2	117	5.64	56	0
2007	69	6	85.3	6	52.7	32	1.37	134	0
2006	67.9	17	83.3	19	52.5	37	5.84	51	0
2005	64.4	106	79.5	75	49.4	116	7.92	21	0
2004	63	127	77.2	112	48.8	125	5.79	52	0
2003	68.1	15	84.8	8	51.5	67	3.34	105	0
2002	63.8	116	77.7	108	49.9	111	9.02	13	0
2001	66.5	42	82.4	33	50.7	90	4.79	74	0
2000	65.8	68	82.3	34	49.2	117	2.71	117	0
1999	63.1	125	78.5	95	47.8	132	4.66	77	0
1998	64.6	100	78.9	87	50.4	102	8.63	14	0
1997	63.3	122	77.5	110	49.1	121	6.98	30	0
1996	65	91	81.6	43	48.4	128	1.98	132	0
1995	61.7	131	76.3	125	47.1	134	6.82	32	0
1994	65.5	76	81.4	44	49.6	113	2.88	113	0
1993	58.4	133	69.7	133	47	135	10.30	6	0
1992	62.4	129	76.1	126	48.7	126	6.40	40	0
1991	65.9	66	80.8	53	51	79	6.25	43	0
1990	65.3	84	79.5	75	51.1	74	5.45	60	0
1989	65	91	79	86	51.1	74	9.61	7	0
1988	68.5	12	84.5	12	52.5	37	3.50	102	0
1987	64.6	100	78.6	91	50.5	100	6.81	33	0
1986	66.6	40	81.2	48	52.1	52	4.20	85	0
1985	65.7	71	80	67	51.3	68	5.95	48	0
1984	67.1	28	82.6	31	51.6	65	3.16	111	0
1983	66.1	61	80.2	63	52.1	52	7.91	22	0
1982	64	114	77.8	106	50.3	104	4.16	86	0
1981	64.8	95	79.6	73	50.1	107	3.57	99	0
1980	64.2	111	77.5	110	50.9	83	4.85	72	0
1979	66.8	36	82.1	37	51.6	65	3.17	110	0
1978	65.4	81	79.6	73	51.1	74	5.59	57	0
1977	65.3	84	79.4	79	51.1	74	4.35	81	0
1976	66.4	48	80.1	65	52.8	28	8.08	17	0
1975	65.2	88	77.9	104	52.5	37	7.80	23	0
1974	67.5	24	81.7	41	53.4	22	6.32	41	0
1973	68.8	8	83.3	19	54.2	6	2.44	122	0
1972	66.5	42	79.7	71	53.3	23	3.71	96	0
1971	68.6	11	83.9	16	53.2	24	2.05	131	0
1970	69.6	4	84.1	14	55.1	2	4.25	84	0
1969	66.6	40	81	50	52.2	47	6.47	39	0
1968	63.9	115	76.9	116	50.8	86	5.11	68	0
1967	68.1	15	82.2	35	54.1	7	4.79	74	0
1966	65	91	79.2	83	50.9	83	4.75	76	0
1965	66	63	79.5	75	52.6	35	7.98	19	0
1964	66.8	36	80	67	53.5	19	7.50	26	0
1963	66.4	48	80.6	59	52.2	47	4.33	82	0
1962	64.6	100	78.6	91	50.6	96	5.08	69	0
1961	70.7	2	85.9	4	55.4	1	2.37	124	0
1960	67.4	26	80.8	53	54	9	3.57	99	0
1959	66.5	42	79.5	75	53.6	15	2.29	125	0
1958	64.7	98	76.5	122	52.8	28	7.42	27	0
1957	66.4	48	79.3	81	53.6	15	4.80	73	0
1956	66.1	61	78.5	95	53.8	13	5.28	65	0
1955	65.9	66	78.3	100	53.6	15	5.59	57	0
1954	64.5	103	76.5	122	52.5	37	7.97	20	0
1953	66	63	78.8	88	53.1	25	5.68	54	0
1952	64.7	98	77.7	108	51.7	61	2.58	121	0
1951	61.7	131	73.8	131	49.6	113	8.61	15	0
1950	63.2	124	75.1	129	51.2	70	9.24	10	0
1949	67	33	80.1	65	54	9	2.75	115	0
1948	65.5	76	76.9	116	54	9	7.62	25	0
1947	66.2	59	78.8	88	53.6	15	3.98	89	0
1946	66.3	57	78.8	88	53.8	13	5.06	70	0
1945	66.4	48	78.6	91	54.1	7	4.29	83	0
1944	63.5	120	75.1	129	51.9	55	6.56	37	0
1943	64.8	95	77.2	112	52.4	42	6.97	31	0
1942	64.5	103	76.8	120	52.3	44	4.61	80	0
1941	67.1	28	79.2	83	54.9	4	6.62	36	0
1940	68.8	8	83.8	17	53.9	12	1.69	133	0
1939	66.5	42	81.9	40	51.2	70	3.66	98	0
1938	66.2	59	79.8	70	52.5	37	7.16	29	0
1937	67.7	20	82.8	24	52.6	35	5.24	66	0
1936	71	1	87	2	55	3	2.74	116	0
1935	66.4	48	82.8	24	50.1	107	2.16	128	0
1934	67.1	28	83.6	18	50.7	90	5.24	66	0
1933	69.6	4	86.2	3	52.9	27	8.08	17	0
1932	67.6	22	82.8	24	52.3	44	10.80	5	0
1931	68.7	10	85.2	7	52.2	47	4.97	71	0
1930	69	6	85.6	5	52.4	42	2.41	123	0
1929	68.2	14	84.7	10	51.7	61	3.36	104	0
1928	63.6	119	77.9	104	49.2	117	8.19	16	0
1927	64.3	110	78.4	98	50.3	104	7.19	28	0
1926	66.4	48	82.2	35	50.5	100	5.39	62	0
1925	66.4	48	82.1	37	50.7	90	3.26	107	0
1924	64.1	112	80.3	61	48	130	5.58	59	0
1923	66.3	57	80.8	53	51.7	61	11.36	4	0
1922	67.6	22	83	23	52.2	47	3.77	94	0
1921	67	33	82.7	28	51.3	68	5.38	63	0
1920	66.8	36	82.5	32	51.2	70	2.81	114	0
1919	69.7	3	87.8	1	51.7	61	2.09	129	0
1918	67.1	28	83.3	19	50.9	83	5.37	64	0
1917	66.4	48	82.8	24	50	110	6.19	44	0
1916	63.7	118	76.8	120	50.7	90	9.39	8	1
1915	63.1	125	75.9	127	50.4	102	11.77	3	1
1914	66.9	35	81.4	44	52.3	44	6.30	42	0
1913	67.5	24	81.4	44	53.5	19	5.92	49	0
1912	64.5	103	76.9	116	52	54	6.12	45	0
1911	64.4	106	77	115	51.8	57	6.11	46	0
1910	66.5	42	80.7	57	52.2	47	4.62	79	0
1909	65.6	72	78.6	91	52.7	32	11.83	2	0
1908	65.5	76	79.3	81	51.8	57	7.78	24	0
1907	62.1	130	73.4	132	50.7	90	12.02	1	2
1906	64.4	106	76.9	116	51.9	55	9.13	12	0
1905	65.6	72	78.2	101	53	26	5.72	53	0
1904	66.4	48	80.2	63	52.7	32	2.60	120	1
1903	65.4	81	78	103	52.8	28	5.67	55	0
1902	63.3	122	75.7	128	51	79	6.71	34	0
1901	65.6	72	78.5	95	52.8	28	4.14	87	0
1900	67.8	19	80.8	53	54.8	5	2.63	118	0
1899	63.8	116	76.4	124	51.2	70	3.68	97	0
1898	65.8	68	78.1	102	53.5	19	6.52	38	0
1897	65.5	76	79.4	79	51.8	57	9.20	11	5
1896	66.7	39	82.7	28	50.7	90	2.06	130	0
1895	64.1	112	78.4	98	49.9	111	3.20	109	0
1894	65.5	76	81	50	50.1	107	3.24	108	0
1893					47.7	133	2.62	119	61
1892					48	130			46

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1936	71
1961	70.7
1919	69.7
1970	69.6
1933	69.6
2007	69
1930	69
1973	68.8
1940	68.8
1931	68.7

Coldest
Year	Mean, °F
1993	58.4
1995	61.7
1951	61.7
1907	62.1
1992	62.4
2010	62.9
2004	63
1999	63.1
1915	63.1
1950	63.2

Wettest
Year	Precipitation, in
1907	12.02
1909	11.83
1915	11.77
1923	11.36
1932	10.80
1993	10.30
1989	9.61
1916	9.39
2014	9.35
1950	9.24

Driest
Year	Precipitation, in
2007	1.37
1940	1.69
1996	1.98
1971	2.05
1896	2.06
1919	2.09
1935	2.16
2017	2.24
2015	2.25
1959	2.29

The hottest, coldest and wettest days

Hottest day: 102°F; 1 August 2026
Coldest night: 38°F; 4 August 2026, 14 June 2026
Wettest day: 1.62 in; 28 June 2026

Every month, season and year

Months

Seasons

Years

Great Falls, MT the day's answers

All-time records

Every answer in words

Summer 2026 brought 6.65 in of precipitation in Great Falls, MT, the wettest summer since 2014, 35th wettest of 134.
The hottest day of summer 2026 in Great Falls, MT: 102°F on Saturday 1 August 2026.
The coldest night of summer 2026 in Great Falls, MT: a low of 38°F on Tuesday 4 August 2026 and Sunday 14 June 2026.
The wettest day of summer 2026 in Great Falls, MT: 1.62 in on Sunday 28 June 2026.