S
M
T
W
T
F
S
30
89°
73°
31
93°
72°
1
94°
73°
2
97°
76°
3
90°
71°
4
91°
68°
5
83°
65°
6
83°
62°
7
82°
66°
8
86°
67°
9
87°
62°
10
81°
59°
11
77°
57°
12
77°
57°
13
76°
57°
14
74°
55°
15
76°
52°
16
80°
58°
17
79°
57°
18
71°
56°
19
76°
57°
20
77°
56°
21
75°
56°
22
75°
54°
23
72°
54°
24
73°
51°
25
76°
53°
26
76°
49°
27
66°
44°
28
64°
42°
29
65°
44°
30
64°
42°
1
63°
44°
2
67°
50°
3
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wonder Lake
Wonder Lake's September 2026 forecast shows daily high temperatures ranging from 63° to 91°, with overnight lows between 42° and 71°. The average high for September is 76° with an average low of 55°. 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 Wonder Lake. See also: October | November | December.
