Dubuque, IA: September

30 September 2026: September 2026 averaged 66.8°F in Dubuque, IA, the warmest September since 2015 (2025 excluded: 10 of 30 days missing), tied 19th warmest of 152 (with 1947).

September 2026

Mean temperature: 66.8°F; Warmest since 2015; 19th warmest of 152
Precipitation: 9.41 in; Wettest since 2019; 9th wettest of 152

A normal September in Dubuque, IA (1991 to 2020): a mean temperature of 62.3°F, between 59.3°F and 66.1°F in eight years of ten and 3.70 in of precipitation, between 1.38 in and 5.85 in in eight years of ten.

The mean temperature of every September in Dubuque, IA since 1874: 66.8°F in 2026; the highest is 70.1°F, in 1931.

Normal range, 59.3 to 66.1°F

Every year, ranked, as a table

Every September in Dubuque, IA from 1873 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	66.8	19	74.4	53	59.2	3	9.41	9	0
2025									10
2024	66.6	21	78.9	7	54.4	51	0.08	151	0
2023	66.1	28	76.1	32	56.2	27	2.37	99	0
2022	64	61	73.9	62	54.1	57	0.60	149	0
2021	65.8	33	77.7	14	53.9	61	1.30	132	0
2020	60.3	124	70.5	122	50.1	122	8.24	16	0
2019	66.2	25	75	49	57.4	14	13.31	2	0
2018	64.4	48	74.3	55	54.6	47	8.93	14	0
2017	65.1	40	76.6	24	53.6	65	1.02	140	0
2016	66	31	75.4	40	56.6	22	5.17	36	0
2015	67.6	12	77.5	16	57.8	10	4.03	55	0
2014	60.5	123	71.3	112	49.7	123	2.14	106	0
2013	64.4	48	75.3	44	53.6	65	2.37	99	0
2012	60	130	73.2	72	46.7	152	1.17	136	0
2011	58.4	146	68.1	148	48.8	137	2.50	93	0
2010	61.4	110	72	91	50.8	115	2.47	95	0
2009	62.4	87	72.6	79	52.2	95	1.71	118	0
2008	63.4	70	72.8	75	54	59	3.66	66	0
2007	64.1	59	76	33	52.3	93	4.20	49	0
2006	58.7	143	68.4	146	48.9	134	4.61	41	0
2005	66.2	25	78.1	11	54.4	51	1.91	112	0
2004	65.1	40	77.5	16	52.6	87	0.64	147	0
2003	60.6	119	72.6	79	48.5	142	3.73	63	0
2002	64.3	51	75.7	38	52.9	79	3.47	70	0
2001	59.6	135	69.6	135	49.6	125	5.58	32	0
2000	62.6	82	72.8	75	52.4	90	3.42	72	0
1999	60.3	124	71.7	101	48.9	134	1.69	120	0
1998	66.1	28	76.4	27	55.8	30	3.75	62	0
1997	62.3	88	71.8	97	52.8	81	4.10	53	0
1996	61.2	113	71	116	51.4	106	1.97	111	0
1995	60.2	126	70.7	119	49.6	125	1.40	130	0
1994	64.8	43	74.7	52	54.8	44	4.51	44	0
1993	57.3	150	65.8	152	48.8	137	4.50	46	0
1992	59.4	140	69.3	138	49.5	128	4.57	43	0
1991	61.2	113	71.8	97	50.7	117	3.76	61	0
1990	64.2	53	74.3	55	54.1	57	0.57	150	0
1989	58.5	145	69.9	130	47.1	150	2.38	98	0
1988	64.2	53	75.9	34	52.5	89	2.72	89	0
1987	61.6	108	71.4	109	51.9	100	3.31	76	0
1986	63.2	72	71.6	104	54.9	43	13.06	4	0
1985	61.8	100	70.5	122	53.1	75	4.89	39	0
1984	60.6	119	71.7	101	49.5	128	2.22	103	0
1983	62.9	73	74.3	55	51.5	105	3.54	69	0
1982	60.8	116	71.3	112	50.3	120			0
1981	61.6	108	72.1	88	51.1	110	4.20	49	0
1980	63.6	66	73.8	63	53.3	72	6.48	26	0
1979	63.3	71	75	49	51.6	103	0.07	152	0
1978	66.2	25	77.8	13	54.6	47	4.51	44	0
1977	61.7	104	69.7	133	53.7	64	3.45	71	0
1976	59.7	133	71.5	106	47.9	145	0.88	142	0
1975	57.2	152	66.9	151	47.6	146	1.91	112	0
1974	57.6	149	68.5	145	46.8	151	0.62	148	0
1973	62.5	84	70.4	125	54.6	47	7.27	20	0
1972	62.1	93	71.5	106	52.7	86	5.58	32	0
1971	64.8	43	74.9	51	54.8	44	3.96	56	0
1970	62.5	84	72	91	53	76	9.16	10	0
1969	61.9	96	72.7	78	51.1	110	1.04	139	0
1968	60.6	119	70.1	127	51	112	5.67	30	0
1967	60.7	117	71.8	97	49.7	123	11.88	5	0
1966	60.7	117	72.2	86	49.1	131	1.65	121	0
1965	60.2	126	68.4	146	51.9	100	15.46	1	0
1964	61.1	115	70.6	120	51.6	103	2.48	94	0
1963	62.3	88	72.6	79	51.9	100	3.09	85	0
1962	58.6	144	69	140	48.3	143	3.27	79	0
1961	61.8	100	71.7	101	52	97	13.13	3	0
1960	64.8	43	74.3	55	55.2	37	4.12	52	0
1959	62.8	74	72.6	79	53	76	3.84	58	0
1958	61.7	104	72.1	88	51.3	108	2.06	108	0
1957	59.5	138	70.1	127	48.9	134	1.33	131	0
1956	59.6	135	71.8	97	47.3	149	1.78	116	0
1955	63.9	63	76.5	25	51.3	108	3.41	73	0
1954	64.1	59	75.3	44	52.8	81	2.25	102	0
1953	62.1	93	75.4	40	48.8	137	1.18	135	0
1952	61.9	96	75.1	47	48.6	141	0.85	143	0
1951	58.3	147	69	140	47.5	148	1.47	128	0
1950	63.6	66	73.3	70	53.9	61	2.72	89	0
1949	59.2	141	69.3	138	49.1	131	1.09	138	0
1948	68.2	8	78.6	8	57.7	12	1.59	123	0
1947	66.8	19	77	20	56.6	22	2.22	103	0
1946	63.6	66	73.8	63	53.4	71	8.95	12	0
1945	62.8	74	71.9	95	53.6	65	7.34	19	0
1944	65.3	37	73.8	63	56.8	20	3.20	80	0
1943	60.2	126	69.4	136	51	112	1.86	115	0
1942	61.3	112	69.8	132	52.8	81	3.82	59	0
1941	66.9	15	76.7	22	57	18	8.94	13	0
1940	64.9	42	75.8	36	54	59	1.48	127	0
1939	68.4	6	79.9	4	56.9	19	0.69	144	0
1938	65.2	38	74.3	55	56	28	9.09	11	0
1937	64.8	43	76.3	29	53.3	72	1.87	114	0
1936	66.3	24	75.4	40	57.2	17	5.10	37	0
1935	65.2	38	75.1	47	55.3	36	2.30	101	0
1934	61.9	96	70.9	117	52.9	79	6.54	25	0
1933	68.4	6	78.6	8	58.2	8	3.28	78	0
1932	61.9	96	73	73	50.8	115	1.71	118	0
1931	70.1	1	79.2	6	60.9	1	6.67	24	0
1930	65.7	35	76.7	22	54.6	47	2.52	92	0
1929	62.7	78	72.3	84	53	76	1.55	124	0
1928	59.8	132	70	129	49.6	125	1.27	133	0
1927	66.9	15	76.2	30	57.5	13	10.70	6	0
1926	62.7	78	69.7	133	55.8	30	5.48	34	0
1925	67.9	11	77	20	58.7	4	4.16	51	0
1924	58.2	148	67.3	149	49.1	131	2.44	96	0
1923	62.7	78	71.3	112	54.2	55	5.04	38	0
1922	65.9	32	76.4	27	55.4	34	3.40	74	0
1921	66.9	15	76.5	25	57.3	15	8.35	15	0
1920	66.4	23	76.2	30	56.5	25	1.46	129	0
1919	66.1	28	75.4	40	56.8	20	5.35	35	0
1918	57.3	150	67.1	150	47.6	146	1.63	122	0
1917	61.8	100	71.3	112	52.3	93	2.40	97	0
1916	62.2	91	71.9	95	52.4	90	6.19	27	0
1915	64.5	47	73.7	66	55.2	37	9.62	8	0
1914	64.4	48	74	61	54.8	44	4.75	40	0
1913	63.6	66	73.3	70	53.8	63	3.59	67	0
1912	63.9	63	72.3	84	55.4	34	4.42	47	0
1911	64	61	72.9	74	55	41	3.56	68	0
1910	62.8	74	72.1	88	53.5	69	3.10	83	0
1909	62.2	91	72	91	52.4	90	4.28	48	0
1908	68.1	10	79.6	5	56.6	22	1.14	137	0
1907	61.7	104	70.6	120	52.8	81	6.01	28	0
1906	68.5	5	78.5	10	58.6	5	1.78	116	0
1905	67	14	75.9	34	58.2	8	1.25	134	0
1904	64.2	53	73.4	67	55	41	2.21	105	0
1903	61.7	104	71.5	106	52	97	3.20	80	0
1902	59.5	138	68.8	142	50.3	120	3.93	57	0
1901	62.8	74	72	91	53.5	69	3.72	64	0
1900	65.4	36	75.2	46	55.6	33	3.34	75	0
1899	62.5	84	72.8	75	52.2	95	0.99	141	0
1898	65.8	33	75.7	38	55.9	29	3.07	86	0
1897	69.9	2	81.2	1	58.6	5	3.19	82	0
1896	59.6	135	68.7	143	50.5	119	5.67	30	0
1895	69.8	3	80.3	3	59.3	2	2.06	108	0
1894	66.6	21	77.5	16	55.7	32	2.96	88	0
1893	63.9	63	75.8	36	52	97	3.31	76	0
1892	64.2	53	73.4	67	55.1	39	3.79	60	0
1891	69.3	4	80.8	2	57.8	10	0.68	145	0
1890	60	130	70.8	118	49.3	130	3.72	64	0
1889	62.7	78	72.5	83	52.8	81	1.54	125	0
1888	59.7	133	70.5	122	48.8	137	2.01	110	0
1887	62.6	82	71.6	104	53.6	65	7.62	18	0
1886	64.2	53	74.1	60	54.3	53	3.10	83	0
1885	62.3	88	71.4	109	53.2	74	4.58	42	0
1884	68.2	8	78.1	11	58.3	7	4.07	54	0
1883	59	142	69.9	130	48	144	2.09	107	0
1882	61.8	100	72.2	86	51.4	106	2.60	91	0
1881	67.5	13	77.7	14	57.3	15	10.26	7	0
1880	62	95	71.4	109	52.6	87	6.84	23	0
1879	60.1	129	69.4	136	50.7	117	2.98	87	0
1878	64.3	51	74.4	53	54.3	53	6.94	22	0
1877	66.9	15	77.3	19	56.5	25	0.67	146	0
1876	61.4	110	68.6	144	54.2	55	5.90	29	0
1875	60.6	119	70.2	126	50.9	114	7.11	21	0
1874	64.2	53	73.4	67	55.1	39	7.68	17	0
1873							1.53	126	30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1931	70.1
1897	69.9
1895	69.8
1891	69.3
1906	68.5
1939	68.4
1933	68.4
1948	68.2
1884	68.2
1908	68.1

Coldest
Year	Mean, °F
1975	57.2
1993	57.3
1918	57.3
1974	57.6
1924	58.2
1951	58.3
2011	58.4
1989	58.5
1962	58.6
2006	58.7

Wettest
Year	Precipitation, in
1965	15.46
2019	13.31
1961	13.13
1986	13.06
1967	11.88
1927	10.70
1881	10.26
1915	9.62
2026	9.41
1970	9.16

Driest
Year	Precipitation, in
1979	0.07
2024	0.08
1990	0.57
2022	0.60
1974	0.62
2004	0.64
1877	0.67
1891	0.68
1939	0.69
1952	0.85

The hottest, coldest and wettest days

Hottest day: 91°F; 4 September 2026, 3 September 2026, 1 September 2026
Coldest night: 47°F; 23 September 2026
Wettest day: 3.31 in; 19 September 2026

Every month, season and year

Months

Seasons

Years

Dubuque, IA the day's answers

All-time records

Every answer in words

September 2026 brought 9.41 in of precipitation in Dubuque, IA, the wettest September since 2019 (2025 excluded: 10 of 30 days missing), 9th wettest of 152.
The hottest day of September 2026 in Dubuque, IA: 91°F on Friday 4 September 2026, Thursday 3 September 2026 and Tuesday 1 September 2026.
The coldest night of September 2026 in Dubuque, IA: a low of 47°F on Wednesday 23 September 2026.
The wettest day of September 2026 in Dubuque, IA: 3.31 in on Saturday 19 September 2026.