S
M
T
W
T
F
S
30
91°
64°
31
87°
70°
1
92°
71°
2
89°
72°
3
95°
69°
4
86°
61°
5
80°
57°
6
76°
57°
7
78°
58°
8
73°
55°
9
79°
59°
10
78°
55°
11
79°
54°
12
73°
53°
13
74°
52°
14
77°
58°
15
74°
58°
16
72°
57°
17
72°
52°
18
70°
48°
19
69°
49°
20
72°
54°
21
77°
56°
22
77°
56°
23
78°
55°
24
78°
55°
25
76°
53°
26
75°
53°
27
76°
54°
28
75°
54°
29
76°
53°
30
71°
48°
1
67°
46°
2
69°
50°
3
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rockhill
Rockhill's September 2026 forecast shows daily high temperatures ranging from 67° to 95°, with overnight lows between 46° and 72°. The average high for September is 77° with an average low of 56°. 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 Rockhill. See also: October | November | December.
