S
M
T
W
T
F
S
30
90°
67°
31
91°
66°
1
85°
66°
2
85°
65°
3
86°
66°
4
85°
66°
5
85°
65°
6
84°
65°
7
86°
64°
8
83°
60°
9
83°
58°
10
84°
61°
11
83°
59°
12
87°
61°
13
86°
63°
14
87°
57°
15
85°
56°
16
80°
57°
17
81°
56°
18
83°
57°
19
85°
56°
20
85°
55°
21
84°
58°
22
85°
60°
23
85°
55°
24
82°
54°
25
83°
53°
26
83°
54°
27
82°
57°
28
83°
57°
29
83°
56°
30
84°
56°
1
82°
57°
2
83°
56°
3
83°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rock Hill
Rock Hill's September 2026 forecast shows daily high temperatures ranging from 80° to 91°, with overnight lows between 53° and 67°. The average high for September is 84° 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 September weather will actually feel in Rock Hill. See also: October | November | December.
