Duluth, MN: September

30 September 2026: September 2026 averaged 59.5°F in Duluth, MN, the warmest September since 2024, tied 21st warmest of 153 (with 1892).

September 2026

Mean temperature: 59.5°F; Warmest since 2024; 21st warmest of 153
Precipitation: 3.45 in; Wettest since 2023; 73rd wettest of 154

A normal September in Duluth, MN (1991 to 2020): a mean temperature of 56.8°F, between 53.7°F and 59.9°F in eight years of ten and 3.51 in of precipitation, between 1.39 in and 5.76 in in eight years of ten.

The mean temperature of every September in Duluth, MN since 1874: 59.5°F in 2026; the highest is 64.4°F, in 2024.

Normal range, 53.7 to 59.9°F

Every year, ranked, as a table

Every September in Duluth, MN from 1872 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	59.5	21	68.1	22	50.8	23	3.45	73	0
2025	59.1	26	67.3	34	50.9	22	2.53	98	0
2024	64.4	1	76.2	1	52.5	6	0.31	153	0
2023	61.9	4	69.7	11	54.1	2	10.36	2	0
2022	58.6	32	68.2	19	49	41	2.73	93	0
2021	60.2	11	70.9	4	49.4	37	3.60	63	0
2020	54.6	105	64.9	69	44.4	121	0.85	147	0
2019	59.6	19	67.6	29	51.6	14	5.76	20	0
2018	59.1	26	67.2	35	51	21	3.51	69	0
2017	58.6	32	68.1	22	49.1	39	3.55	65	0
2016	59.9	15	68	24	51.8	13	3.52	67	0
2015	61.5	6	70.6	5	52.4	8	6.81	6	0
2014	57.4	45	66.7	44	48.2	55	1.64	125	0
2013	59.9	15	69.8	10	50	31	1.26	141	0
2012	56.2	64	68.4	18	44	126	0.84	148	0
2011	56.2	64	66.4	51	46.1	90	1.48	131	0
2010	52	140	60.6	141	43.4	133	3.48	70	0
2009	62.1	3	71.6	3	52.5	6	1.40	137	0
2008	56.2	64	65	65	47.3	68	4.17	51	0
2007	57.4	45	67.5	32	47.3	68	4.38	42	0
2006	54.3	110	64	91	44.7	118	2.86	90	0
2005	59.7	18	69.6	12	49.8	33	3.60	63	0
2004	59.1	26	67.9	27	50.4	28	4.31	44	0
2003	56.2	64	65.5	59	46.9	78	3.52	67	0
2002	58	39	67.4	33	48.6	48	3.93	55	0
2001	55.3	87	65	65	45.7	96	1.41	135	0
2000	53.9	113	64.5	76	43.3	134	2.02	113	0
1999	54.5	109	63.9	92	45.1	109	5.80	19	0
1998	59.3	23	69.6	12	49	41	3.33	77	0
1997	57.5	43	66.7	44	48.2	55	1.75	123	0
1996	56.2	64	63.7	98	48.6	48	5.34	26	0
1995	55.1	92	64.9	69	45.2	108	3.02	85	0
1994	58.4	35	67.2	35	49.7	34	5.61	21	0
1993	49.5	151	58.1	149	40.9	149	1.81	121	0
1992	53.8	116	64.3	85	43.2	137	3.90	56	0
1991	52.9	126	62.2	116	43.7	129	9.38	3	0
1990	56.2	64	66.5	49	45.9	94	6.49	10	0
1989	55.8	77	67	41	44.7	118	4.40	41	0
1988	55.3	87	65	65	45.7	96	6.18	14	0
1987	57.2	50	67.7	28	46.7	83	2.93	88	0
1986	52.7	133	61.3	133	44	126	6.26	12	0
1985	52.1	139	61.3	133	42.9	140	6.02	16	0
1984	51.9	141	62	122	41.8	146	3.82	58	0
1983	56.6	56	64.5	76	48.6	48	5.57	23	0
1982	54.3	110	62.8	108	45.8	95	4.19	50	0
1981	52.9	126	62.1	119	43.7	129	2.42	100	0
1980	52.9	126	61.6	130	44.2	123	6.61	8	0
1979	56.8	53	66.5	49	47.2	71	2.01	114	0
1978	57.3	48	66.6	47	47.9	61	1.52	127	0
1977	53.2	122	60.7	139	45.6	99	5.97	17	0
1976	55.3	87	67.6	29	42.9	140	1.84	120	0
1975	50.9	146	59	148	42.8	142	2.32	103	0
1974	47.8	153	57.2	152	38.5	153	0.98	145	0
1973	53.5	119	62.9	107	44.2	123	4.28	46	0
1972	50	150	60.5	142	39.5	151	5.30	27	0
1971	57.3	48	67.1	38	47.4	67	2.67	95	0
1970	55.5	83	65.2	62	45.7	96	2.01	114	0
1969	56.7	54	66.3	52	47	77	4.13	52	0
1968	56.5	58	66.3	52	46.8	80	3.42	74	0
1967	55.9	73	67.1	38	44.8	113	1.34	138	0
1966	54.8	99	65.9	57	43.7	129	1.52	127	0
1965	48	152	56.5	153	39.4	152	5.56	24	0
1964	52.4	137	61.5	132	43.2	137	6.58	9	0
1963	57.9	40	68	24	47.7	64	2.80	92	0
1962	51.8	142	62.6	112	41.1	147	3.03	84	0
1961	54.6	105	65	65	44.3	122	3.01	86	0
1960	55.5	83	64.7	73	46.3	86	1.66	124	0
1959	54.9	96	64.5	76	45.3	107	4.83	32	0
1958	55.5	83	64.9	69	46.2	87	4.33	43	0
1957	52.5	136	63	106	42.1	145	2.98	87	0
1956	50.7	148	61	137	40.3	150	1.92	118	0
1955	54.6	105	64.3	85	44.9	112	4.83	32	0
1954	53.4	120	61.3	133	45.4	105	2.92	89	0
1953	54.9	96	64.3	85	45.5	102	0.88	146	0
1952	56.1	71	66.7	44	45.5	102	0.19	154	0
1951	51	145	59.3	147	42.7	143	6.25	13	0
1950	54.8	99	64.8	72	44.8	113	1.43	133	0
1949	52.9	126	63.1	105	42.7	143	2.22	108	0
1948	60.2	11	72.6	2	47.8	62	0.37	151	0
1947	55.3	87	63.4	102	47.2	71	1.53	126	0
1946	55	95	63.8	94	46.1	90	4.20	48	0
1945	54.3	110	63.2	104	45.4	105	4.72	37	0
1944	55.9	73	63.8	94	48	58	2.43	99	0
1943	52.6	135	62	122	43.1	139	2.00	116	0
1942	53.3	121	61.8	125	44.8	113	1.50	130	0
1941	56.9	52	64.4	83	49.4	37	6.28	11	0
1940	60	14	69.5	15	50.5	26	3.47	72	0
1939	56.6	56	65.2	62	48	58	0.72	149	0
1938	57.9	40	66.9	43	48.9	44	2.85	91	0
1937	56.2	64	65.3	61	47.1	74	4.30	45	0
1936	58.9	29	68.2	19	49.5	35	1.48	131	0
1935	52.9	126	62.6	112	43.3	134	1.96	117	0
1934	52.8	131	60.7	139	44.8	113	3.10	82	0
1933	60.1	13	69.1	16	51.1	19	5.14	30	0
1932	56.7	54	67.2	35	46.2	87	0.68	150	0
1931	61.5	6	70.5	6	52.4	8	3.63	62	0
1930	55.7	78	65.9	57	45.6	99	4.68	39	0
1929	53.8	116	62.8	108	44.8	113	4.82	34	0
1928	51.7	143	60	143	43.3	134	3.86	57	0
1927	57.5	43	65.4	60	49.5	35	3.36	75	0
1926	50.9	146	57.6	151	44.1	125	5.51	25	0
1925	56.4	60	64.3	85	48.6	48	3.73	60	0
1924	52.7	133	61.8	125	43.6	132	3.95	54	0
1923	56.4	60	64.5	76	48.3	52	2.61	96	0
1922	58.2	37	67.6	29	48.9	44	2.23	107	0
1921	58.2	37	66.2	54	50.2	30	3.09	83	0
1920	60.3	10	69	17	51.6	14	1.31	139	0
1919	55.9	73	63.9	92	47.8	62	1.42	134	0
1918	50.3	149	59.5	145	41.1	147	1.41	135	0
1917	53.6	118	61.7	129	45.6	99	2.15	110	0
1916	53	125	62.1	119	43.8	128	4.25	47	0
1915	55.7	78	64.4	83	46.9	78	2.28	105	0
1914	55.9	73	63.6	101	48.3	52	2.55	97	0
1913	53.9	113	61.8	125	46	92	3.32	78	0
1912	54.8	99	62.8	108	46.8	80	1.80	122	0
1911	53.1	124	60.8	138	45.5	102	3.35	76	0
1910	55.6	80	64.5	76	46.8	80	4.20	48	0
1909	54.9	96	63.8	94	46	92	3.28	80	0
1908	60.4	9	70.1	8	50.6	24	3.55	65	0
1907	51.5	144	58	150	45	110	6.71	7	0
1906	61	8	69.6	12	52.3	10	3.66	61	0
1905	58.6	32	66.2	54	51.1	19	7.72	5	0
1904	52.3	138	59.5	145	45	110	3.48	70	0
1903	54.7	104	62.2	116	47.3	68	4.76	36	0
1902	53.2	122	59.9	144	46.4	84	1.52	127	0
1901	57.4	45	64.2	89	50.6	24	2.30	104	0
1900	58.7	31	66.1	56	51.2	18	4.80	35	0
1899	55.1	92	62.2	116	48	58	2.05	112	0
1898	59.2	25	68	24	50.3	29	1.21	142	0
1897	62.6	2	70.5	6	54.7	1	3.14	81	0
1896	54.6	105	62.1	119	47.1	74	1.00	144	0
1895	57.6	42	64.6	75	50.5	26	5.96	18	0
1894	59.8	17	68.2	19	51.5	16	2.08	111	0
1893	56.4	60	63.7	98	49.1	39	1.04	143	0
1892	59.5	21	67	41	51.9	12	0.32	152	0
1891	61.6	5	70	9	53.1	3	3.31	79	0
1890	55.1	92	63.8	94	46.4	84	2.39	101	0
1889	54.8	99	61.8	125	47.7	64	4.02	53	0
1888	55.6	80	63.7	98	47.5	66	2.27	106	0
1887	56.1	71	63.3	103	48.8	46	2.68	94	0
1886	52.8	131	61.1	136	44.5	120	6.05	15	0
1885	55.6	80	64.2	89	47.1	74	2.35	102	0
1884	58.4	35	64.5	76	52.3	10	4.70	38	0
1883	55.3	87	62.4	114	48.1	57	2.21	109	0
1882	58.8	30	64.5	76	53	4	1.29	140	0
1881	56.3	63	62.7	111	49.9	32	11.52	1	0
1880	57	51	65.2	62	48.7	47	1.85	119	0
1879	53.9	113	61.6	130	46.2	87	5.24	28	0
1878	56.5	58	64.7	73	48.3	52	4.68	39	0
1877	59.6	19	66.6	47	52.6	5			0
1876	55.4	86	61.9	124	49	41	8.68	4	0
1875	54.8	99	62.3	115	47.2	71	3.76	59	0
1874	59.3	23	67.1	38	51.5	16	5.59	22	0
1873							5.16	29	30
1872							5.01	31	30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2024	64.4
1897	62.6
2009	62.1
2023	61.9
1891	61.6
2015	61.5
1931	61.5
1906	61
1908	60.4
1920	60.3

Coldest
Year	Mean, °F
1974	47.8
1965	48
1993	49.5
1972	50
1918	50.3
1956	50.7
1975	50.9
1926	50.9
1951	51
1907	51.5

Wettest
Year	Precipitation, in
1881	11.52
2023	10.36
1991	9.38
1876	8.68
1905	7.72
2015	6.81
1907	6.71
1980	6.61
1964	6.58
1990	6.49

Driest
Year	Precipitation, in
1952	0.19
2024	0.31
1892	0.32
1948	0.37
1932	0.68
1939	0.72
2012	0.84
2020	0.85
1953	0.88
1974	0.98

The hottest, coldest and wettest days

Hottest day: 81°F; 1 September 2026
Coldest night: 39°F; 14 September 2026
Wettest day: 1.22 in; 3 September 2026

Every month, season and year

Months

Seasons

Years

Duluth, MN the day's answers

All-time records

Every answer in words

September 2026 brought 3.45 in of precipitation in Duluth, MN, the wettest September since 2023, 73rd wettest of 154.
The hottest day of September 2026 in Duluth, MN: 81°F on Tuesday 1 September 2026.
The coldest night of September 2026 in Duluth, MN: a low of 39°F on Monday 14 September 2026.
The wettest day of September 2026 in Duluth, MN: 1.22 in on Thursday 3 September 2026.