S
M
T
W
T
F
S
30
78°
57°
31
80°
58°
1
80°
58°
2
79°
57°
3
80°
50°
4
74°
47°
5
71°
50°
6
72°
56°
7
78°
56°
8
79°
54°
9
78°
55°
10
72°
54°
11
76°
53°
12
76°
56°
13
77°
56°
14
76°
55°
15
78°
54°
16
77°
48°
17
72°
53°
18
76°
46°
19
71°
45°
20
71°
44°
21
65°
42°
22
66°
50°
23
67°
47°
24
67°
43°
25
65°
42°
26
65°
42°
27
69°
48°
28
72°
49°
29
71°
48°
30
70°
48°
1
63°
47°
2
64°
39°
3
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lisle
Lisle's September 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 39° and 58°. The average high for September is 73° with an average low of 50°. 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 Lisle. See also: October | November | December.
