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