Wisconsin September Temperature by Year

This page is a list of the average statewide temperature in the month of September in Wisconsin 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 Hottest September in Wisconsin History?

2015 was the warmest September in Wisconsin history. Statewide, the average daily high temperature was 75.2 °F, and the average low was 54.1 °F.

What Was the Coldest September in Wisconsin History?

1918 was the coolest September in Wisconsin history. Statewide, the average daily high temperature was 64.2 °F, and the average low was 39.4 °F.

Click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	6	73.2	53.3
2022	36	71.0	49.4
2021	24	73.4	48.9
2020	82	67.4	47.2
2019	14	70.9	53.0
2018	23	71.3	51.2
2017	12	73.8	50.6
2016	10	72.1	53.1
2015	1	75.2	54.1
2014	66	69.4	47.1
2013	30	73.0	48.5
2012	76	71.3	44.1
2011	82	67.8	46.7
2010	93	67.3	46.4
2009	20	73.7	49.1
2008	33	71.4	49.7
2007	24	72.8	49.4
2006	103	67.1	45.7
2005	5	75.5	51.2
2004	7	75.2	50.9
2003	44	70.9	47.8
2002	18	72.7	50.4
2001	82	68.0	46.6
2000	67	69.4	46.8
1999	75	70.0	45.7
1998	7	76.0	50.1
1997	44	70.0	48.7
1996	55	69.1	48.4
1995	103	68.1	44.6
1994	24	71.2	51.1
1993	128	62.7	42.4
1992	103	66.9	45.9
1991	103	66.7	46.1
1990	35	70.9	49.6
1989	82	69.8	44.8
1988	46	70.9	47.8
1987	48	70.7	47.6
1986	67	67.2	49.0
1985	71	67.8	48.2
1984	112	67.2	44.6
1983	50	69.7	48.4
1982	98	66.4	46.9
1981	108	67.2	45.2
1980	87	67.6	46.9
1979	46	71.2	47.3
1978	16	73.0	50.6
1977	67	66.8	49.3
1976	101	70.8	42.3
1975	125	64.9	43.0
1974	127	65.0	41.2
1973	74	67.9	48.0
1972	95	67.0	46.4
1971	36	71.0	49.4
1970	61	68.7	48.1
1969	67	69.6	46.6
1968	61	68.6	48.2
1967	98	69.4	44.1
1966	93	69.0	44.8
1965	124	63.0	45.1
1964	95	66.9	46.6
1963	57	70.2	47.0
1962	118	66.2	43.9
1961	56	69.0	48.3
1960	39	70.2	49.5
1959	42	70.4	48.8
1958	54	69.9	47.8
1957	109	67.5	44.5
1956	115	67.3	43.0
1955	51	71.9	46.1
1954	77	67.3	47.7
1953	61	71.1	45.7
1952	59	71.6	45.4
1951	119	64.9	44.0
1950	87	68.4	45.9
1949	119	66.2	42.8
1948	12	76.0	48.4
1947	39	71.1	48.5
1946	79	69.4	45.3
1945	91	68.0	46.1
1944	51	69.0	48.9
1943	122	65.5	42.9
1942	113	65.7	45.5
1941	32	70.9	50.2
1940	39	71.6	48.0
1939	28	73.6	48.2
1938	71	68.4	47.6
1937	51	71.5	46.4
1936	20	72.9	50.0
1935	77	69.2	45.8
1934	107	66.7	45.8
1933	9	75.3	50.5
1932	95	70.2	43.3
1931	2	75.9	52.7
1930	48	72.5	46.0
1929	82	68.8	45.7
1928	119	65.8	43.2
1927	31	71.2	50.2
1926	114	64.8	46.3
1925	19	72.9	50.0
1924	126	64.4	42.8
1923	59	69.6	47.4
1922	28	73.2	48.6
1921	16	73.1	50.5
1920	22	73.9	48.6
1919	38	71.8	48.4
1918	129	64.2	39.4
1917	109	68.1	43.9
1916	109	67.2	44.9
1915	64	69.5	47.1
1914	64	69.6	46.9
1913	71	69.7	46.3
1912	57	69.2	48.0
1911	79	68.4	46.5
1910	91	68.6	45.5
1909	87	68.8	45.7
1908	3	77.4	50.0
1907	101	66.5	46.6
1906	10	74.1	51.1
1905	34	71.5	49.2
1904	87	68.1	46.2
1903	98	67.6	45.8
1902	115	65.8	44.7
1901	79	68.8	46.1
1900	42	70.4	48.8
1899	115	66.9	43.4
1898	27	73.4	48.6
1897	4	76.3	50.9
1896	123	65.0	43.2
1895	14	74.0	49.9