Green Bay, WI: September

30 September 2026: September 2026 averaged 63.1°F in Green Bay, WI, the warmest September since 2024, 24th warmest of 140.

September 2026

Mean temperature: 63.1°F; Warmest since 2024; 24th warmest of 140
Precipitation: 5.73 in; Wettest since 2019; 12th wettest of 141

A normal September in Green Bay, WI (1991 to 2020): a mean temperature of 60.2°F, between 58°F and 64.3°F in eight years of ten and 2.84 in of precipitation, between 1.21 in and 5.03 in in eight years of ten.

The mean temperature of every September in Green Bay, WI since 1886: 63.1°F in 2026; the highest is 67.3°F, in 1931.

Normal range, 58 to 64.3°F

Every year, ranked, as a table

Every September in Green Bay, WI from 1886 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	63.1	24	73.5	25	52.7	32	5.73	12	0
2025	62.4	37	74.2	21	50.7	59	1.77	109	0
2024	65.9	6	79.1	1	52.6	35	0.84	131	0
2023	64.6	10	74.9	16	54.3	13	0.51	138	0
2022	62.8	30	73.1	28	52.5	37	3.30	57	0
2021	62.7	31	74.6	18	50.8	56	1.17	126	0
2020	59.7	76	70.1	71	49.2	89	2.36	93	0
2019	64.3	12	72.5	36	56.1	3	9.37	1	0
2018	62.9	28	73.1	28	52.7	32	4.96	23	0
2017	63.9	17	76.1	11	51.6	44	1.01	129	0
2016	64.3	12	74.3	19	54.3	13	4.29	34	0
2015	66.3	3	76.7	5	55.8	5	5.85	8	0
2014	58.8	96	69.9	73	47.6	110	4.69	29	0
2013	60.9	56	72.9	32	48.8	94	2.89	77	0
2012	58.4	104	71.4	56	45.4	132	1.09	127	0
2011	57.7	117	68.3	104	47	118	4.54	31	0
2010	58.3	105	68.4	101	48.2	101	4.48	32	0
2009	61.3	47	73.9	23	48.6	98	1.22	123	0
2008	61.2	50	71.8	49	50.5	65	1.89	108	0
2007	62.6	33	75	15	50.2	74	3.16	67	0
2006	58	110	69.2	87	46.7	122	3.33	54	0
2005	64.3	12	76.3	8	52.4	38	3.08	69	0
2004	64.6	10	77.7	3	51.5	46	0.47	139	0
2003	60.3	61	71.3	58	49.4	85	3.32	55	0
2002	62.5	36	74.1	22	51	52	2.67	85	0
2001	58.3	105	68.8	95	47.7	107	2.35	95	0
2000	58	110	68.5	98	47.5	113	3.94	39	0
1999	58.6	99	71.6	53	45.6	129	1.24	121	0
1998	63.5	21	76.3	8	50.6	63	3.54	46	0
1997	60	66	70.8	64	49.2	89	2.76	81	0
1996	59.4	84	70.8	64	48.1	102	1.40	118	0
1995	58.3	105	69.3	86	47.2	115	2.76	81	0
1994	63.7	19	73.7	24	53.6	22	2.19	100	0
1993	55.4	136	65.2	137	45.6	129	2.78	80	0
1992	58.5	100	68.9	91	48.1	102	5.61	14	0
1991	58.5	100	69	88	47.9	104	2.55	89	0
1990	61.8	43	71.9	45	51.6	44	5.13	19	0
1989	59	95	72.4	38	45.5	131	0.58	137	0
1988	61	53	71.5	55	50.4	69	4.11	36	0
1987	61.1	51	72	43	50.1	75	1.57	114	0
1986	59.2	88	68.1	108	50.4	69	7.51	3	0
1985	60.8	57	69.7	77	51.9	40	3.65	42	0
1984	57.5	122	67.2	119	47.7	107	5.66	13	0
1983	59.8	73	69.8	75	49.8	78	3.59	43	0
1982	57.6	119	66.6	125	48.6	98	1.43	117	0
1981	56.8	126	66.7	123	46.8	121	3.25	63	0
1980	59.1	91	68.8	95	49.3	87	3.42	49	0
1979	60	66	71	62	49	93	0.76	134	0
1978	62.4	37	71.9	45	52.8	29	4.82	26	0
1977	59.5	79	68.3	104	50.7	59	2.44	90	0
1976	57.7	117	71.3	58	44	140	0.28	141	0
1975	54.6	138	65	139	44.2	137	3.18	66	0
1974	54.2	139	66.5	128	41.9	141	1.05	128	0
1973	59.5	79	70.1	71	48.8	94	2.91	76	0
1972	59.5	79	69.6	80	49.4	85	5.76	11	0
1971	62.3	40	72.7	35	51.8	41	3.36	53	0
1970	60.2	64	69.8	75	50.7	59	6.11	7	0
1969	58.7	97	69.7	77	47.6	110	2.03	103	0
1968	61.6	44	72.5	36	50.6	63	3.31	56	0
1967	58	110	70.6	68	45.4	132	0.46	140	0
1966	56.9	125	69.6	80	44.1	138	1.21	124	0
1965	57.5	122	66.5	128	48.5	100	7.80	2	0
1964	58.5	100	67.4	117	49.5	83	6.74	4	0
1963	58.5	100	69.9	73	47	118	3.00	72	0
1962	58	110	69.4	82	46.6	126	3.87	40	0
1961	61.5	45	71.8	49	51.2	49	5.02	22	0
1960	60.7	58	70.6	68	50.7	59	3.09	68	0
1959	61	53	72.2	39	49.8	78	5.17	17	0
1958	59.1	91	70.2	70	47.9	104	3.20	65	0
1957	56.8	126	68.1	108	45.4	132	2.15	102	0
1956	55.1	137	66.2	132	44.1	138	1.65	112	0
1955	60	66	73.3	27	46.7	122	0.76	134	0
1954	58.7	97	68.5	98	48.8	94	5.78	10	0
1953	59.5	79	72	43	47	118	2.02	104	0
1952	59.7	76	73.1	28	46.2	127	0.82	132	0
1951	56.7	128	67.2	119	46.2	127	2.93	75	0
1950	57.9	115	68	110	47.7	107	2.20	98	0
1949	56	134	66.9	122	45	136	1.25	120	0
1948	64	15	75.4	13	52.6	35	1.40	118	0
1947	62	41	71.4	56	52.7	32	2.97	73	0
1946	60.3	61	70.9	63	49.7	81	2.81	79	0
1945	59.9	69	68.4	101	51.3	48	2.57	88	0
1944	61	53	68.5	98	53.4	24	3.99	38	0
1943	56.6	130	65.4	135	47.8	106	0.81	133	0
1942	58	110	66.3	131	49.6	82	3.43	48	0
1941	63.4	22	71.9	45	54.9	9	4.08	37	0
1940	62	41	70.8	64	53.2	25	2.36	93	0
1939	62.6	33	72.1	41	53	27	3.27	60	0
1938	59.9	69	67.6	116	52.2	39	6.31	5	0
1937	61.5	45	71.7	52	51.4	47	2.84	78	0
1936	63.8	18	73.1	28	54.4	12	2.23	97	0
1935	59.4	84	68.4	101	50.4	69	3.29	58	0
1934	59.1	91	67.7	115	50.5	65	1.91	107	0
1933	65.8	7	75.8	12	55.7	6	2.01	105	0
1932	60.6	59	71.6	53	49.5	83	1.21	124	0
1931	67.3	1	76.2	10	58.3	1	5.84	9	0
1930	62.4	37	72.9	32	51.8	41	1.64	113	0
1929	59.8	73	68.7	97	50.9	54	2.38	92	0
1928	56.6	130	66.1	133	47.1	116	2.34	96	0
1927	63	25	71.3	58	54.7	10	4.82	26	0
1926	57.8	116	65.4	135	50.1	75	4.87	24	0
1925	62.9	28	71.9	45	53.8	20	3.38	52	0
1924	55.9	135	64.2	140	47.5	113	3.04	71	0
1923	59.8	73	67.8	112	51.8	41	1.48	115	0
1922	63	25	71.8	49	54.2	15	2.74	83	0
1921	65.5	8	74.3	19	56.6	2	2.62	87	0
1920	63	25	72.2	39	53.7	21	0.91	130	0
1919	62.7	31	71.1	61	54.2	15	2.97	73	0
1918	54.2	139	63	141	45.3	135	1.71	111	0
1917	58.3	105	67.3	118	49.3	87	1.95	106	0
1916	58.2	109	66.6	125	49.8	78	3.27	60	0
1915	61.3	47	69.7	77	52.8	29	5.10	20	0
1914	61.1	51	69.4	82	52.8	29	4.86	25	0
1913	59.9	69	68.9	91	50.8	56	3.56	45	0
1912	61.3	47	68.9	91	53.6	22	4.70	28	0
1911	59.7	76	68.2	107	51.1	51	5.16	18	0
1910	59.2	88	68	110	50.4	69	6.24	6	0
1909	59.9	69	69	88	50.8	56	2.68	84	0
1908	66.3	3	76.9	4	55.7	6	1.45	116	0
1907	59.1	91	67.2	119	51	52	3.80	41	0
1906	65.5	8	75.1	14	56	4	2.20	98	0
1905	62.6	33	72.1	41	53.1	26	2.42	91	0
1904	59.4	84	68.3	104	50.4	69	4.44	33	0
1903	59.5	79	68.9	91	50	77	3.39	51	0
1902	57.6	119	66.4	130	48.7	97	2.63	86	0
1901	60.2	64	69.4	82	50.9	54	4.15	35	0
1900	63.4	22	72.9	32	53.9	19	5.09	21	0
1899	56.7	128	66.7	123	46.7	122	2.16	101	0
1898	63.7	19	73.4	26	54	17	3.07	70	0
1897	66	5	76.6	6	55.5	8	3.21	64	0
1896	56.3	133	65.2	137	47.6	110	5.21	16	2
1895			76.4	7	54	17	1.24	121	4
1894	64	15	74.7	17	53	27	3.27	60	2
1893	59.3	87	69.4	82	49.2	89	3.51	47	0
1892	60.6	59	70.7	67	50.5	65	3.40	50	0
1891	66.4	2	77.9	2	54.5	11	0.60	136	2
1890	57.3	124	67.8	112	46.7	122	1.77	109	0
1889	60.3	61	69	88	51.2	49	4.68	30	2
1888	56.6	130	66.6	125	47.1	116	5.36	15	2
1887	57.6	119	65.9	134	49.2	89	3.29	58	0
1886	59.2	88	67.8	112	50.5	65	3.58	44	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1931	67.3
1891	66.4
2015	66.3
1908	66.3
1897	66
2024	65.9
1933	65.8
1921	65.5
1906	65.5
2023	64.6
More years share the last value

Coldest
Year	Mean, °F
1974	54.2
1918	54.2
1975	54.6
1956	55.1
1993	55.4
1924	55.9
1949	56
1896	56.3
1943	56.6
1928	56.6
More years share the last value

Wettest
Year	Precipitation, in
2019	9.37
1965	7.80
1986	7.51
1964	6.74
1938	6.31
1910	6.24
1970	6.11
2015	5.85
1931	5.84
1954	5.78

Driest
Year	Precipitation, in
1976	0.28
1967	0.46
2004	0.47
2023	0.51
1989	0.58
1891	0.60
1979	0.76
1955	0.76
1943	0.81
1952	0.82

The hottest, coldest and wettest days

Hottest day: 90°F; 1 September 2026
Coldest night: 40°F; 27 September 2026, 14 September 2026
Wettest day: 1.88 in; 14 September 2026

Every month, season and year

Months

Seasons

Years

Green Bay, WI the day's answers

All-time records

Every answer in words

September 2026 brought 5.73 in of precipitation in Green Bay, WI, the wettest September since 2019, 12th wettest of 141.
The hottest day of September 2026 in Green Bay, WI: 90°F on Tuesday 1 September 2026.
The coldest night of September 2026 in Green Bay, WI: a low of 40°F on Sunday 27 September 2026 and Monday 14 September 2026.
The wettest day of September 2026 in Green Bay, WI: 1.88 in on Monday 14 September 2026.