S
M
T
W
T
F
S
26
100°
81°
27
98°
81°
28
100°
78°
29
101°
82°
30
101°
81°
31
100°
81°
1
101°
81°
2
101°
82°
3
100°
82°
4
102°
81°
5
102°
81°
6
100°
80°
7
97°
76°
8
92°
75°
9
93°
75°
10
93°
76°
11
94°
76°
12
95°
77°
13
94°
78°
14
94°
76°
15
93°
77°
16
93°
78°
17
94°
79°
18
96°
80°
19
98°
79°
20
99°
80°
21
98°
76°
22
91°
74°
23
89°
73°
24
90°
74°
25
91°
74°
26
91°
75°
27
90°
75°
28
97°
75°
29
98°
75°
30
98°
76°
31
96°
73°
1
97°
72°
2
94°
73°
3
89°
71°
4
94°
71°
5
96°
72°
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 89° to 102°, with overnight lows between 71° and 82°. The average high for August is 96° with an average low of 77°. 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.
