S
M
T
W
T
F
S
26
84°
69°
27
79°
66°
28
79°
64°
29
80°
65°
30
84°
70°
31
85°
68°
1
82°
66°
2
84°
67°
3
86°
61°
4
79°
62°
5
79°
65°
6
80°
61°
7
79°
60°
8
80°
59°
9
79°
59°
10
79°
67°
11
81°
64°
12
81°
64°
13
85°
59°
14
78°
59°
15
81°
61°
16
80°
60°
17
76°
60°
18
77°
59°
19
78°
59°
20
79°
61°
21
81°
65°
22
82°
66°
23
84°
67°
24
85°
67°
25
86°
63°
26
84°
60°
27
80°
64°
28
83°
65°
29
80°
58°
30
81°
56°
31
77°
55°
1
75°
58°
2
74°
57°
3
76°
57°
4
75°
56°
5
74°
56°
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 86°, with overnight lows between 55° and 70°. The average high for August is 80° with an average low of 62°. 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.
