Des Moines, IA: September

30 September 2026: September 2026 averaged 70.6°F in Des Moines, IA, the warmest September since 2024, 9th warmest of 149.

September 2026

Mean temperature: 70.6°F; Warmest since 2024; 9th warmest of 149
Precipitation: 14.50 in; Wettest since 1914; 2nd wettest of 149

A normal September in Des Moines, IA (1991 to 2020): a mean temperature of 66.5°F, between 62.9°F and 71.4°F in eight years of ten and 3.12 in of precipitation, between 0.97 in and 5.28 in in eight years of ten.

The mean temperature of every September in Des Moines, IA since 1878: 70.6°F in 2026; the highest is 73.7°F, in 1897.

Normal range, 62.9 to 71.4°F

Every year, ranked, as a table

Every September in Des Moines, IA from 1878 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	70.6	9	77.6	54	63.6	1	14.50	2	0
2025	69.8	17	80.6	19	58.9	16	1.76	109	0
2024	70.9	7	82.3	6	59.5	12	0.60	144	0
2023	70.5	10	82.5	4	58.6	20	2.43	84	0
2022	67.8	39	78	50	57.5	34	3.52	57	0
2021	70.4	13	82.2	7	58.5	22	0.83	138	0
2020	64.3	99	74.6	95	54	97	3.96	49	0
2019	71.6	4	81.1	13	62.1	2	4.90	32	0
2018	67.5	42	76.5	69	58.5	22	8.32	7	0
2017	70.8	8	82.1	8	59.6	10	2.84	71	0
2016	71.4	5	80.8	16	61.9	5	5.50	22	0
2015	71.9	3	81.7	11	62.1	2	5.25	28	0
2014	65.7	76	75.2	87	56.2	52	4.23	43	0
2013	71.4	5	82.5	4	60.3	8	2.36	88	0
2012	66.5	60	79.6	28	53.3	105	0.98	133	0
2011	64.1	103	74.1	104	54.1	96	0.71	141	0
2010	66.6	58	76.7	67	56.5	48	4.10	45	0
2009	67.2	48	77.5	57	56.9	41	1.22	125	0
2008	65.4	82	75.1	90	55.8	61	3.62	55	0
2007	66.7	55	77.7	53	55.6	70	3.52	57	0
2006	62.8	121	72.6	125	52.9	111	3.98	48	0
2005	70.1	16	81.8	10	58.4	26	1.41	117	0
2004	68.4	27	79.5	31	57.3	35	1.28	123	0
2003	63.4	113	75	92	51.7	126	2.53	82	0
2002	68.1	32	79.4	33	56.7	43	1.06	130	0
2001	63.5	112	73.4	118	53.6	103	4.76	34	0
2000	67.2	48	79.3	35	55.1	79	1.84	107	0
1999	62.9	120	74.4	98	51.4	127	2.31	89	0
1998	70.4	13	80.8	16	59.9	9	0.69	142	0
1997	66.4	63	76.6	68	56.1	56	2.14	93	0
1996	62.5	124	72.1	131	52.9	111	4.05	47	1
1995	63.2	117	74.3	100	52.1	120	3.12	65	0
1994	66.4	63	77.5	57	55.2	78	3.11	66	0
1993	59.2	149	69.1	148	49.3	146	5.79	21	0
1992	63.1	119	73.4	118	52.7	114	4.99	31	0
1991	65	90	77.1	60	52.9	111	0.90	137	0
1990	68.1	32	79	39	57.2	38	1.40	119	0
1989	62.1	129	73	121	51.3	128	5.41	26	0
1988	66.9	52	78.4	45	55.4	74	2.89	70	0
1987	65.1	89	76	76	54.3	93	1.40	119	0
1986	67.3	46	76.1	74	58.6	20	6.41	16	0
1985	64.8	94	73.8	111	55.7	65	5.42	25	0
1984	62.4	125	73.9	109	50.9	134	2.76	74	0
1983	67.7	41	79.6	28	55.7	65	3.87	50	0
1982	64.9	92	73.6	114	56.2	52	2.94	69	0
1981	66	71	77	61	55	81	2.30	90	0
1980	66.8	53	78.2	48	55.4	74	1.03	131	0
1979	66.8	53	78.9	41	54.6	87	0.97	134	0
1978	70.5	10	81.4	12	59.6	10	6.39	17	0
1977	66.5	60	75.3	85	57.7	31	2.82	72	0
1976	65.7	76	77.4	59	54	97	1.00	132	0
1975	61.8	134	71.5	138	52.1	120	1.70	111	0
1974	60.9	139	72.5	127	49.2	147	2.08	95	0
1973	65.7	76	73.6	114	57.8	30	7.07	13	0
1972	64.6	96	74.7	93	54.5	91	5.45	24	0
1971	68.1	32	79.4	33	56.7	43	2.19	92	0
1970	65.5	80	75.1	90	55.9	59	6.51	14	0
1969	66.1	67	76.3	72	55.8	61	2.43	84	0
1968	63.2	117	73.8	111	52.7	114	2.63	77	0
1967	62.3	128	74.1	104	50.4	139	2.54	80	0
1966	62.4	125	73.8	111	51	132	0.75	139	0
1965	61	137	70.1	146	51.9	124	7.23	11	0
1964	63.6	111	72.5	127	54.6	87	4.28	42	0
1963	65.9	72	75.8	80	56	57	1.88	104	0
1962	63.3	114	74.2	102	52.4	118	1.93	102	0
1961	62.4	125	72	134	52.7	114	10.19	4	0
1960	66.6	58	77	61	56.2	52	2.54	80	0
1959	64.3	99	74.3	100	54.3	93	3.13	64	0
1958	65.2	84	75.5	82	54.8	83	4.06	46	0
1957	62	130	72.6	125	51.3	128	1.79	108	0
1956	65	90	77.8	52	52.1	120	1.21	126	0
1955	68.1	32	80.5	21	55.7	65	4.42	41	0
1954	67.8	39	78.9	41	56.7	43	1.98	100	0
1953	66.1	67	81	15	51.3	128	0.66	143	0
1952	66.1	67	79.1	38	53	110	0.53	145	0
1951	60.8	140	70.8	142	50.8	136	1.39	121	0
1950	65.2	84	77	61	53.4	104	0.41	148	0
1949	60	146	72.2	130	47.8	149	2.21	91	0
1948	69.6	18	81.1	13	58	28	1.27	124	0
1947	68.4	27	80.2	23	56.5	48	0.72	140	0
1946	64.9	92	75.6	81	53.9	99	3.05	67	1
1945	63.7	110	74.1	104	53.3	105	6.51	14	0
1944	65.2	84	74.6	95	55.7	65	2.46	83	0
1943	60.6	142	70.7	143	50.5	138	2.02	97	0
1942	62	130	71.4	139	52.6	117	2.72	75	0
1941	66.1	67	76.1	74	56	57	8.63	5	0
1940	67	51	78.5	43	55.4	74	0.53	145	0
1939	69.6	18	82.7	2	56.5	48	1.18	127	0
1938	68.9	23	80.6	19	57.3	35	2.55	79	0
1937	67.5	42	80.4	22	54.6	87	1.41	117	0
1936	69.5	20	79.5	31	59.5	12	8.50	6	0
1935	66.2	65	76.8	65	55.6	70	5.99	20	0
1934	61.4	135	72	134	50.9	134	6.20	18	0
1933	70.5	10	82	9	59	15	2.40	86	0
1932	63.3	114	75.2	87	51.3	128	2.11	94	0
1931	72.4	2	82.6	3	62.1	2	4.44	39	0
1930	68.2	31	80.8	16	55.6	70	1.53	116	0
1929	63.8	107	73.6	114	53.9	99	4.67	36	0
1928	62	130	73	121	51	132	1.87	106	0
1927	68.9	23	79.3	35	58.5	22	3.65	54	0
1926	64.1	103	72	134	56.2	52	10.25	3	0
1925	70.4	13	79.8	27	61	6	3.75	52	0
1924	60.5	143	70.6	145	50.4	139	3.47	59	0
1923	65.2	84	74.4	98	55.9	59	5.17	29	0
1922	68	36	78.4	45	57.7	31	3.00	68	0
1921	69.4	21	79.9	25	58.8	18	7.16	12	0
1920	68	36	78.1	49	58	28	4.44	39	0
1919	68.9	23	79	39	58.8	18	7.47	10	0
1918	60.2	145	71.3	141	49.1	148	0.91	136	0
1917	64	106	73.2	120	54.8	83	1.99	99	0
1916	64.3	99	75.4	84	53.2	107	1.72	110	0
1915	65.7	76	74.7	93	56.6	47	4.51	37	0
1914	65.9	72	76	76	55.7	65	14.81	1	0
1913	65.9	72	76	76	55.8	61	2.65	76	0
1912	63.3	114	72.1	131	54.4	92	4.20	44	0
1911	67.1	50	76.9	64	57.2	38	7.68	9	0
1910	64.4	98	74.2	102	54.6	87	3.82	51	0
1909	63.8	107	73.9	109	53.7	101	2.06	96	0
1908	68.3	29	80	24	56.7	43	0.94	135	0
1907	63.8	107	74	108	53.7	101	2.40	86	0
1906	67.9	38	78	50	57.7	31	3.24	62	0
1905	67.3	46	76.4	70	58.2	27	3.47	59	0
1904	65.2	84	75.2	87	55.1	79	1.95	101	0
1903	61.9	133	71.9	137	51.9	124	1.62	113	0
1902	59.9	147	69.5	147	50.2	141	5.03	30	0
1901	64.8	94	75.3	85	54.3	93	2.60	78	0
1900	65.4	82	75.5	82	55.3	77	3.66	53	0
1899	64.1	103	75.9	79	52.2	119	1.17	128	0
1898	67.5	42	78.5	43	56.4	51	1.91	103	0
1897	73.7	1	86.5	1	60.9	7	1.56	115	0
1896	59.6	148	68.5	149	50.6	137	3.61	56	0
1895	69.4	21	79.9	25	58.9	16	3.20	63	0
1894	66.7	55	77.6	54	55.8	61	4.46	38	0
1893	66.2	65	79.2	37	53.2	107	1.33	122	0
1892	65.8	75	76.8	65	54.8	83	1.12	129	0
1891	68.3	29	79.6	28	56.9	41	1.64	112	0
1890	61	137	72.3	129	49.7	145	1.57	114	0
1889	62.8	121	73.6	114	52.1	120	3.41	61	0
1888	61.4	135	72.7	124	50.1	143	0.48	147	0
1887	64.5	97	74.1	104	54.9	82	6.06	19	0
1886	66.7	55	76.4	70	57	40	7.93	8	0
1885	64.3	99	73	121	55.5	73	4.82	33	0
1884	68.8	26	78.4	45	59.1	14	5.46	23	0
1883	60.4	144	70.7	143	50.2	141	1.88	104	0
1882	65.5	80	76.2	73	54.8	83	0.15	149	0
1881	67.4	45	77.6	54	57.3	35	4.70	35	0
1880	62.6	123	72.1	131	53.1	109	5.34	27	0
1879	60.7	141	71.4	139	49.9	144	2.79	73	0
1878	66.5	60	74.5	97	58.5	22	2.00	98	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1897	73.7
1931	72.4
2015	71.9
2019	71.6
2016	71.4
2013	71.4
2024	70.9
2017	70.8
2026	70.6
2023	70.5
More years share the last value

Coldest
Year	Mean, °F
1993	59.2
1896	59.6
1902	59.9
1949	60
1918	60.2
1883	60.4
1924	60.5
1943	60.6
1879	60.7
1951	60.8

Wettest
Year	Precipitation, in
1914	14.81
2026	14.50
1926	10.25
1961	10.19
1941	8.63
1936	8.50
2018	8.32
1886	7.93
1911	7.68
1919	7.47

Driest
Year	Precipitation, in
1882	0.15
1950	0.41
1888	0.48
1952	0.53
1940	0.53
2024	0.60
1953	0.66
1998	0.69
2011	0.71
1947	0.72

The hottest, coldest and wettest days

Hottest day: 96°F; 2 September 2026, 1 September 2026
Coldest night: 51°F; 23 September 2026
Wettest day: 3.77 in; 8 September 2026

Every month, season and year

Months

Seasons

Years

Des Moines, IA the day's answers

All-time records

Every answer in words

September 2026 brought 14.50 in of precipitation in Des Moines, IA, the wettest September since 1914, 2nd wettest of 149.
The hottest day of September 2026 in Des Moines, IA: 96°F on Wednesday 2 September 2026 and Tuesday 1 September 2026.
The coldest night of September 2026 in Des Moines, IA: a low of 51°F on Wednesday 23 September 2026.
The wettest day of September 2026 in Des Moines, IA: 3.77 in on Tuesday 8 September 2026.