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
65°
42°
14
69°
61°
15
76°
57°
16
66°
60°
17
72°
55°
18
72°
60°
19
72°
58°
20
68°
54°
21
69°
51°
22
70°
53°
23
70°
55°
24
72°
54°
25
76°
55°
26
71°
47°
27
75°
54°
28
74°
54°
29
71°
54°
30
71°
53°
1
73°
52°
2
72°
51°
3
70°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Delavan
Delavan's September 2026 forecast shows daily high temperatures ranging from 65° to 76°, with overnight lows between 42° and 61°. The average high for September is 71° with an average low of 54°. 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. See also: October | November | December.
