S
M
T
W
T
F
S
30
87°
67°
31
87°
65°
1
85°
64°
2
87°
65°
3
88°
70°
4
91°
69°
5
81°
70°
6
72°
64°
7
78°
64°
8
82°
67°
9
82°
58°
10
81°
53°
11
84°
59°
12
73°
54°
13
69°
49°
14
68°
57°
15
72°
50°
16
67°
55°
17
71°
59°
18
71°
59°
19
71°
55°
20
72°
50°
21
70°
49°
22
71°
51°
23
69°
52°
24
73°
56°
25
75°
55°
26
70°
46°
27
75°
54°
28
69°
53°
29
69°
52°
30
70°
47°
1
71°
50°
2
67°
50°
3
70°
49°
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 67° to 75°, with overnight lows between 46° and 59°. The average high for September is 70° with an average low of 52°. 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.
