S
M
T
W
T
F
S
30
89°
73°
31
93°
72°
1
94°
73°
2
97°
76°
3
88°
71°
4
88°
70°
5
82°
62°
6
79°
56°
7
79°
55°
8
81°
55°
9
81°
68°
10
78°
56°
11
80°
55°
12
84°
56°
13
68°
46°
14
71°
42°
15
77°
62°
16
70°
58°
17
69°
60°
18
71°
62°
19
71°
60°
20
65°
57°
21
62°
51°
22
62°
47°
23
68°
51°
24
70°
53°
25
69°
54°
26
72°
51°
27
70°
53°
28
72°
54°
29
70°
53°
30
69°
52°
1
68°
45°
2
65°
51°
3
64°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Delavan Lake
Delavan Lake's September 2026 forecast shows daily high temperatures ranging from 62° to 72°, with overnight lows between 45° and 62°. The average high for September is 68° with an average low of 53°. 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 Delavan Lake. See also: October | November | December.
