S
M
T
W
T
F
S
26
84°
66°
27
81°
67°
28
88°
68°
29
88°
68°
30
87°
67°
31
86°
68°
1
87°
68°
2
88°
68°
3
89°
68°
4
86°
67°
5
87°
67°
6
88°
68°
7
89°
66°
8
80°
63°
9
79°
64°
10
79°
65°
11
86°
67°
12
87°
68°
13
88°
69°
14
88°
67°
15
87°
66°
16
81°
65°
17
80°
63°
18
80°
66°
19
86°
66°
20
87°
65°
21
88°
66°
22
87°
62°
23
84°
58°
24
79°
58°
25
80°
57°
26
80°
57°
27
81°
58°
28
81°
56°
29
83°
60°
30
85°
63°
31
81°
64°
1
82°
64°
2
86°
59°
3
86°
54°
4
78°
55°
5
77°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lisle
Lisle's August 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 54° and 69°. The average high for August is 84° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Lisle. See also: September | October | November.
