S
M
T
W
T
F
S
30
76°
60°
31
80°
61°
1
79°
54°
2
76°
54°
3
76°
53°
4
77°
53°
5
75°
52°
6
77°
58°
7
80°
56°
8
76°
56°
9
80°
58°
10
81°
57°
11
78°
57°
12
80°
58°
13
80°
58°
14
79°
57°
15
80°
57°
16
79°
55°
17
77°
56°
18
77°
57°
19
78°
56°
20
78°
55°
21
77°
50°
22
77°
47°
23
72°
52°
24
69°
53°
25
Hist. Avg.
72°
51°
26
Hist. Avg.
71°
51°
27
Hist. Avg.
71°
50°
28
Hist. Avg.
70°
50°
29
Hist. Avg.
70°
50°
30
Hist. Avg.
70°
49°
1
Hist. Avg.
69°
49°
2
Hist. Avg.
69°
48°
3
Hist. Avg.
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rockhill
Rockhill's September 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 47° and 61°. The average high for September is 77° with an average low of 55°. 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.
