S
M
T
W
T
F
S
30
70°
53°
31
69°
55°
1
69°
55°
2
66°
54°
3
68°
52°
4
66°
50°
5
64°
50°
6
64°
54°
7
66°
51°
8
67°
52°
9
66°
53°
10
66°
49°
11
65°
49°
12
65°
50°
13
64°
51°
14
62°
52°
15
62°
48°
16
61°
47°
17
61°
46°
18
62°
47°
19
62°
48°
20
61°
47°
21
61°
47°
22
62°
48°
23
62°
49°
24
61°
47°
25
61°
48°
26
62°
51°
27
60°
50°
28
Hist. Avg.
60°
48°
29
Hist. Avg.
60°
48°
30
Hist. Avg.
60°
48°
1
Hist. Avg.
59°
47°
2
Hist. Avg.
59°
47°
3
Hist. Avg.
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rotherham
Rotherham's September 2026 forecast shows daily high temperatures ranging from 60° to 70°, with overnight lows between 46° and 55°. The average high for September is 64° with an average low of 50°. 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 Rotherham. See also: October | November | December.