S
M
T
W
T
F
S
26
89°
68°
27
84°
69°
28
82°
66°
29
80°
63°
30
85°
60°
31
77°
67°
1
71°
65°
2
78°
66°
3
83°
62°
4
85°
65°
5
81°
69°
6
80°
67°
7
85°
66°
8
83°
66°
9
86°
64°
10
89°
72°
11
79°
66°
12
83°
67°
13
76°
67°
14
79°
70°
15
80°
71°
16
86°
71°
17
82°
65°
18
79°
63°
19
84°
65°
20
80°
62°
21
80°
59°
22
83°
64°
23
77°
58°
24
79°
55°
25
79°
58°
26
84°
62°
27
83°
61°
28
81°
60°
29
82°
66°
30
86°
68°
31
84°
69°
1
86°
67°
2
85°
69°
3
86°
66°
4
86°
65°
5
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lemont
Lemont's August 2026 forecast shows daily high temperatures ranging from 79° to 86°, with overnight lows between 60° and 69°. The average high for August is 84° with an average low of 65°. 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 Lemont. See also: September | October | November.
