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Green Bay September Weather

Averages and records for weather in Green Bay, Wisconsin in the month of September.

Typical Green Bay September Weather 1991–2020
Average daily high	71.9 °F
Average daily low	49.6 °F
Average monthly precipitation	3.2 inches
Average monthly snow	none
Daily chance of precipitation	32.3%
Daily chance of snow	0%

Green Bay September Weather Records 1886–2024
Highest temperature	97 °F	September 10, 1931
Lowest temperature	24 °F	September 29, 1949
Highest daily low	75 °F	September 3, 1898
Lowest daily high	43 °F	September 27, 1942
Hottest average high temperature	77.8 °F	1891
Coldest average high temperature	63.0 °F	1918
Most daily precipitation	3.6 inches	September 16, 1888
Most monthly precipitation	9.4 inches	2019
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	76.3	54.4	95	38
September 2	76.2	54.2	94	38
September 3	76.0	54.0	92	36
September 4	75.8	53.7	91	38
September 5	75.6	53.5	92	37
September 6	75.3	53.2	91	38
September 7	75.0	52.9	93	35
September 8	74.7	52.5	96	37
September 9	74.3	52.0	95	36
September 10	74.0	51.6	97	36
September 11	73.7	51.2	95	35
September 12	73.3	50.9	93	32
September 13	73.0	50.6	92	33
September 14	72.5	50.2	94	34
September 15	72.1	49.8	94	32
September 16	71.7	49.5	92	33
September 17	71.2	49.1	90	32
September 18	70.8	48.7	92	33
September 19	70.4	48.4	92	28
September 20	69.8	48.1	92	27
September 21	69.3	47.6	90	28
September 22	69.0	47.3	93	27
September 23	68.6	47.0	91	27
September 24	68.4	46.7	92	28
September 25	68.1	46.3	90	30
September 26	67.6	45.9	86	28
September 27	67.3	45.5	89	29
September 28	66.9	45.1	88	27
September 29	66.5	44.7	86	24
September 30	65.9	44.3	87	25

Weather Station Details

Years	Station	Coordinates
1886–2024	Green Bay	location