S
M
T
W
T
F
S
26
80°
66°
27
81°
65°
28
80°
65°
29
87°
67°
30
88°
66°
31
84°
62°
1
82°
65°
2
87°
65°
3
80°
55°
4
80°
63°
5
81°
58°
6
85°
56°
7
84°
58°
8
85°
56°
9
85°
62°
10
84°
59°
11
80°
56°
12
85°
54°
13
78°
54°
14
79°
57°
15
78°
59°
16
78°
56°
17
79°
52°
18
78°
55°
19
82°
58°
20
80°
62°
21
83°
64°
22
86°
64°
23
87°
61°
24
87°
53°
25
78°
54°
26
80°
53°
27
79°
55°
28
82°
56°
29
85°
51°
30
77°
52°
31
79°
56°
1
75°
55°
2
77°
58°
3
76°
51°
4
76°
49°
5
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rock Valley
Rock Valley's August 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 49° and 67°. The average high for August is 81° with an average low of 58°. 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 Rock Valley. See also: September | October | November.
