S
M
T
W
T
F
S
30
82°
67°
31
89°
68°
1
90°
67°
2
83°
65°
3
79°
66°
4
82°
68°
5
76°
58°
6
79°
56°
7
80°
53°
8
73°
57°
9
84°
59°
10
77°
53°
11
79°
52°
12
80°
56°
13
69°
46°
14
71°
40°
15
78°
56°
16
71°
49°
17
68°
55°
18
66°
53°
19
61°
57°
20
63°
49°
21
62°
49°
22
63°
47°
23
67°
43°
24
71°
44°
25
73°
46°
26
71°
42°
27
71°
40°
28
73°
50°
29
75°
46°
30
69°
60°
1
68°
51°
2
65°
38°
3
67°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Green Bay
Green Bay's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Green Bay. See also: October | November | December.
