Iowa September Precipitation by Year

This page is a list of the average statewide precipitation in the month of September in Iowa 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 Iowa History?

1965 was the wettest September in Iowa history with an average monthly statewide precipitation of 9.84 inches.

What Was the Driest September in Iowa History?

1939 was the driest September in Iowa history with an average monthly statewide precipitation of 0.84 inches.

Click column headers to sort

Year	Rank	Precipitation (in)
2023	98	2.13
2022	109	1.84
2021	112	1.83
2020	46	4.07
2019	12	6.21
2018	3	8.10
2017	92	2.31
2016	13	6.12
2015	40	4.18
2014	36	4.35
2013	108	1.94
2012	116	1.62
2011	115	1.68
2010	21	5.40
2009	113	1.73
2008	41	4.16
2007	76	2.87
2006	38	4.22
2005	63	3.29
2004	82	2.66
2003	68	3.11
2002	114	1.71
2001	47	4.07
2000	99	2.11
1999	110	1.84
1998	105	2.06
1997	69	3.11
1996	75	2.88
1995	73	2.96
1994	57	3.58
1993	54	3.69
1992	19	5.58
1991	80	2.79
1990	123	1.39
1989	29	4.84
1988	56	3.61
1987	86	2.58
1986	9	6.79
1985	22	5.31
1984	104	2.07
1983	44	4.10
1982	60	3.41
1981	85	2.59
1980	66	3.13
1979	121	1.46
1978	20	5.51
1977	32	4.69
1976	120	1.47
1975	97	2.14
1974	117	1.59
1973	8	6.92
1972	18	5.61
1971	90	2.42
1970	14	6.10
1969	91	2.34
1968	33	4.66
1967	84	2.61
1966	122	1.43
1965	1	9.84
1964	34	4.56
1963	87	2.47
1962	96	2.17
1961	6	7.26
1960	59	3.53
1959	37	4.35
1958	70	3.07
1957	81	2.70
1956	118	1.54
1955	71	3.05
1954	95	2.19
1953	126	0.92
1952	128	0.85
1951	88	2.47
1950	102	2.09
1949	65	3.20
1948	106	2.03
1947	100	2.10
1946	25	5.02
1945	39	4.21
1944	93	2.25
1943	94	2.22
1942	45	4.10
1941	5	7.43
1940	127	0.87
1939	129	0.84
1938	16	5.95
1937	119	1.54
1936	7	6.99
1935	62	3.34
1934	28	4.97
1933	42	4.16
1932	101	2.10
1931	10	6.74
1930	89	2.44
1929	51	3.78
1928	74	2.94
1927	31	4.76
1926	2	9.56
1925	24	5.04
1924	72	3.00
1923	17	5.95
1922	103	2.08
1921	11	6.69
1920	64	3.23
1919	23	5.30
1918	111	1.84
1917	77	2.87
1916	50	3.85
1915	15	6.08
1914	4	7.47
1913	61	3.37
1912	48	3.99
1911	27	5.00
1910	52	3.74
1909	55	3.64
1908	124	1.25
1907	78	2.86
1906	43	4.14
1905	58	3.56
1904	79	2.84
1903	53	3.72
1902	35	4.46
1901	30	4.81
1900	26	5.02
1899	125	0.96
1898	83	2.62
1897	107	1.97
1896	49	3.97
1895	67	3.12