S
M
T
W
T
F
S
26
84°
68°
27
87°
74°
28
90°
73°
29
85°
68°
30
86°
73°
31
84°
72°
1
85°
72°
2
90°
74°
3
91°
74°
4
90°
73°
5
90°
71°
6
89°
73°
7
90°
74°
8
90°
74°
9
91°
73°
10
90°
72°
11
88°
71°
12
90°
73°
13
89°
72°
14
83°
66°
15
82°
65°
16
82°
65°
17
83°
70°
18
83°
68°
19
85°
69°
20
88°
71°
21
87°
70°
22
84°
69°
23
87°
70°
24
89°
66°
25
85°
66°
26
87°
68°
27
88°
69°
28
83°
70°
29
85°
67°
30
82°
68°
31
82°
69°
1
83°
69°
2
82°
68°
3
82°
61°
4
80°
58°
5
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Riverwood
Riverwood's August 2026 forecast shows daily high temperatures ranging from 79° to 91°, with overnight lows between 58° and 74°. The average high for August is 86° with an average low of 69°. 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 Riverwood. See also: September | October | November.