S
M
T
W
T
F
S
30
81°
68°
31
87°
70°
1
93°
73°
2
93°
73°
3
92°
71°
4
91°
72°
5
87°
69°
6
86°
63°
7
83°
63°
8
83°
64°
9
84°
63°
10
81°
62°
11
81°
61°
12
80°
59°
13
78°
57°
14
79°
58°
15
78°
54°
16
82°
60°
17
81°
59°
18
74°
58°
19
78°
59°
20
79°
58°
21
77°
58°
22
77°
56°
23
74°
56°
24
75°
54°
25
78°
56°
26
78°
51°
27
68°
46°
28
66°
44°
29
67°
47°
30
66°
44°
1
65°
46°
2
69°
53°
3
68°
52°
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 65° to 93°, with overnight lows between 44° and 73°. The average high for September is 78° with an average low of 58°. 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.
