S
M
T
W
T
F
S
26
91°
71°
27
88°
68°
28
79°
68°
29
80°
64°
30
86°
63°
31
82°
71°
1
76°
66°
2
76°
66°
3
82°
63°
4
86°
68°
5
83°
70°
6
80°
69°
7
86°
69°
8
85°
63°
9
85°
69°
10
88°
70°
11
81°
67°
12
81°
66°
13
79°
61°
14
77°
62°
15
75°
61°
16
77°
61°
17
77°
60°
18
75°
61°
19
77°
62°
20
78°
63°
21
81°
62°
22
85°
68°
23
85°
67°
24
76°
65°
25
79°
66°
26
82°
67°
27
83°
66°
28
82°
65°
29
75°
62°
30
74°
62°
31
74°
61°
1
75°
63°
2
77°
65°
3
75°
65°
4
82°
66°
5
82°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Oak Forest
Oak Forest's August 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 60° and 70°. The average high for August is 79° 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 Oak Forest. See also: September | October | November.
