S
M
T
W
T
F
S
26
99°
81°
27
100°
82°
28
100°
81°
29
99°
82°
30
100°
82°
31
103°
83°
1
97°
84°
2
96°
76°
3
100°
76°
4
101°
80°
5
101°
83°
6
101°
82°
7
101°
81°
8
101°
81°
9
99°
78°
10
99°
79°
11
100°
78°
12
101°
81°
13
101°
82°
14
101°
80°
15
100°
81°
16
104°
83°
17
105°
83°
18
105°
83°
19
105°
84°
20
105°
82°
21
100°
84°
22
105°
84°
23
108°
84°
24
108°
86°
25
101°
84°
26
101°
85°
27
101°
81°
28
102°
80°
29
102°
80°
30
103°
81°
31
102°
80°
1
100°
80°
2
99°
80°
3
101°
79°
4
100°
81°
5
103°
81°
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 99° to 103°, with overnight lows between 79° and 81°. The average high for August is 101° with an average low of 80°. 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.
