S
M
T
W
T
F
S
30
74°
50°
31
75°
49°
1
72°
48°
2
72°
51°
3
73°
51°
4
71°
53°
5
73°
51°
6
72°
50°
7
70°
49°
8
71°
48°
9
69°
48°
10
71°
54°
11
70°
47°
12
70°
47°
13
74°
46°
14
72°
53°
15
73°
52°
16
70°
47°
17
67°
45°
18
70°
45°
19
71°
51°
20
73°
52°
21
73°
50°
22
68°
49°
23
72°
48°
24
70°
46°
25
68°
49°
26
65°
41°
27
70°
41°
28
62°
42°
29
61°
42°
30
61°
40°
1
Hist. Avg.
65°
42°
2
Hist. Avg.
65°
42°
3
Hist. Avg.
64°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rockingham
Rockingham's September 2026 forecast shows daily high temperatures ranging from 61° to 75°, with overnight lows between 40° and 54°. The average high for September is 70° with an average low of 48°. 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 Rockingham. See also: October | November | December.