S
M
T
W
T
F
S
26
89°
73°
27
89°
73°
28
88°
72°
29
88°
72°
30
86°
69°
31
81°
66°
1
82°
70°
2
80°
70°
3
80°
68°
4
85°
72°
5
87°
72°
6
86°
71°
7
81°
68°
8
80°
69°
9
80°
69°
10
82°
69°
11
83°
71°
12
85°
71°
13
87°
72°
14
88°
71°
15
87°
72°
16
89°
67°
17
86°
63°
18
79°
61°
19
77°
61°
20
78°
62°
21
79°
61°
22
79°
62°
23
80°
63°
24
79°
64°
25
82°
67°
26
84°
63°
27
83°
62°
28
78°
61°
29
79°
65°
30
82°
68°
31
83°
61°
1
83°
59°
2
76°
60°
3
77°
65°
4
79°
68°
5
84°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Oak Lawn
Oak Lawn's August 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 59° and 73°. The average high for August is 83° with an average low of 67°. 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 Oak Lawn. See also: September | October | November.
