Montana September Precipitation by Year

This page is a list of the average statewide precipitation in the month of September in Montana for each year from 1895–2023. It is a statewide average over the entire territory of the state, based on data from the NOAA.

State:

Month:

What Was the Rainiest September in Montana History?

1986 was the wettest September in Montana history with an average monthly statewide precipitation of 3.94 inches.

What Was the Driest September in Montana History?

2012 was the driest September in Montana history with an average monthly statewide precipitation of 0.17 inches.

Click column headers to sort

Year	Rank	Precipitation (in)
2023	38	1.75
2022	83	1.07
2021	120	0.44
2020	96	0.94
2019	2	3.58
2018	80	1.09
2017	24	2.10
2016	12	2.47
2015	67	1.29
2014	72	1.20
2013	11	2.53
2012	129	0.17
2011	119	0.47
2010	33	1.87
2009	117	0.55
2008	51	1.62
2007	60	1.46
2006	29	1.92
2005	65	1.30
2004	56	1.53
2003	81	1.08
2002	61	1.37
2001	98	0.92
2000	54	1.54
1999	84	1.07
1998	90	1.02
1997	92	1.00
1996	35	1.82
1995	69	1.25
1994	113	0.65
1993	87	1.03
1992	79	1.11
1991	40	1.73
1990	128	0.22
1989	101	0.84
1988	48	1.67
1987	108	0.73
1986	1	3.94
1985	5	3.09
1984	52	1.61
1983	50	1.64
1982	23	2.11
1981	106	0.75
1980	59	1.50
1979	124	0.37
1978	4	3.21
1977	13	2.43
1976	76	1.16
1975	109	0.69
1974	104	0.81
1973	20	2.27
1972	68	1.26
1971	62	1.37
1970	47	1.68
1969	107	0.75
1968	17	2.33
1967	31	1.89
1966	103	0.82
1965	15	2.38
1964	111	0.68
1963	57	1.53
1962	97	0.93
1961	7	2.80
1960	123	0.41
1959	14	2.42
1958	102	0.83
1957	82	1.08
1956	112	0.66
1955	105	0.78
1954	42	1.72
1953	110	0.69
1952	115	0.62
1951	46	1.69
1950	36	1.77
1949	71	1.22
1948	118	0.55
1947	26	2.03
1946	9	2.66
1945	27	1.99
1944	74	1.19
1943	122	0.42
1942	64	1.32
1941	3	3.40
1940	25	2.06
1939	88	1.03
1938	89	1.03
1937	49	1.66
1936	93	1.00
1935	126	0.31
1934	66	1.30
1933	99	0.88
1932	125	0.37
1931	28	1.93
1930	39	1.75
1929	55	1.54
1928	121	0.44
1927	34	1.87
1926	10	2.59
1925	8	2.79
1924	94	0.99
1923	44	1.71
1922	114	0.63
1921	63	1.36
1920	95	0.96
1919	91	1.02
1918	41	1.73
1917	43	1.72
1916	45	1.70
1915	16	2.35
1914	53	1.57
1913	70	1.25
1912	30	1.90
1911	6	2.81
1910	18	2.33
1909	22	2.14
1908	37	1.76
1907	75	1.18
1906	77	1.13
1905	86	1.04
1904	127	0.28
1903	58	1.53
1902	116	0.57
1901	21	2.18
1900	32	1.88
1899	100	0.86
1898	85	1.06
1897	78	1.12
1896	19	2.30
1895	73	1.20