S
M
T
W
T
F
S
30
75°
51°
31
77°
58°
1
73°
55°
2
76°
54°
3
80°
59°
4
82°
52°
5
79°
50°
6
75°
49°
7
74°
51°
8
73°
56°
9
77°
51°
10
70°
48°
11
70°
45°
12
69°
46°
13
70°
50°
14
69°
45°
15
68°
43°
16
66°
44°
17
66°
42°
18
65°
43°
19
65°
43°
20
66°
44°
21
66°
44°
22
68°
49°
23
70°
51°
24
72°
51°
25
72°
50°
26
71°
42°
27
67°
42°
28
63°
49°
29
62°
47°
30
70°
48°
1
66°
47°
2
62°
39°
3
60°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Green Lake
Green Lake's September 2026 forecast shows daily high temperatures ranging from 60° to 82°, with overnight lows between 39° and 59°. The average high for September is 70° with an average low of 48°. 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 Lake. See also: October | November | December.
