S
M
T
W
T
F
S
26
95°
68°
27
98°
67°
28
98°
66°
29
93°
65°
30
96°
66°
31
98°
64°
1
97°
65°
2
96°
65°
3
95°
64°
4
96°
63°
5
95°
64°
6
95°
64°
7
96°
67°
8
98°
68°
9
98°
68°
10
99°
67°
11
98°
66°
12
98°
64°
13
96°
64°
14
95°
61°
15
92°
62°
16
92°
63°
17
93°
64°
18
95°
68°
19
95°
69°
20
98°
70°
21
99°
69°
22
99°
66°
23
97°
67°
24
98°
65°
25
96°
64°
26
93°
62°
27
92°
60°
28
91°
61°
29
91°
62°
30
93°
65°
31
94°
67°
1
97°
68°
2
97°
68°
3
96°
67°
4
97°
67°
5
97°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Forest Park
Forest Park's August 2026 forecast shows daily high temperatures ranging from 91° to 99°, with overnight lows between 60° and 70°. The average high for August is 96° with an average low of 65°. 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 Forest Park. See also: September | October | November.
