S
M
T
W
T
F
S
26
87°
66°
27
87°
66°
28
86°
65°
29
85°
65°
30
84°
60°
31
79°
59°
1
79°
58°
2
80°
59°
3
81°
65°
4
80°
61°
5
80°
60°
6
82°
65°
7
84°
65°
8
82°
64°
9
81°
62°
10
82°
59°
11
82°
57°
12
84°
59°
13
83°
64°
14
86°
65°
15
85°
63°
16
86°
65°
17
88°
64°
18
86°
59°
19
83°
56°
20
78°
56°
21
77°
57°
22
78°
55°
23
78°
55°
24
79°
56°
25
80°
55°
26
82°
55°
27
82°
56°
28
80°
56°
29
77°
55°
30
77°
55°
31
79°
58°
1
83°
53°
2
77°
52°
3
75°
53°
4
76°
54°
5
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rockhill
Rockhill's August 2026 forecast shows daily high temperatures ranging from 75° to 88°, with overnight lows between 52° and 66°. The average high for August is 81° with an average low of 59°. 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 Rockhill. See also: September | October | November.