S
M
T
W
T
F
S
26
92°
72°
27
86°
70°
28
80°
65°
29
80°
62°
30
87°
63°
31
81°
70°
1
73°
65°
2
78°
65°
3
83°
62°
4
86°
69°
5
82°
70°
6
82°
69°
7
87°
68°
8
84°
70°
9
84°
66°
10
87°
72°
11
81°
69°
12
84°
71°
13
78°
69°
14
80°
70°
15
79°
73°
16
88°
70°
17
81°
67°
18
80°
68°
19
80°
64°
20
81°
64°
21
80°
65°
22
77°
61°
23
75°
61°
24
74°
63°
25
77°
64°
26
80°
66°
27
80°
66°
28
82°
65°
29
79°
62°
30
80°
65°
31
74°
63°
1
73°
66°
2
74°
62°
3
72°
59°
4
73°
60°
5
75°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in River Forest
River Forest's August 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 59° and 70°. The average high for August is 78° 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 River Forest. See also: September | October | November.
