S
M
T
W
T
F
S
30
92°
69°
31
92°
65°
1
89°
65°
2
85°
66°
3
87°
68°
4
90°
68°
5
88°
67°
6
89°
69°
7
90°
68°
8
89°
67°
9
89°
67°
10
83°
68°
11
88°
67°
12
88°
62°
13
82°
64°
14
82°
65°
15
83°
65°
16
86°
62°
17
86°
61°
18
83°
59°
19
81°
60°
20
81°
64°
21
79°
59°
22
80°
59°
23
84°
60°
24
85°
62°
25
84°
63°
26
83°
61°
27
84°
58°
28
78°
57°
29
82°
55°
30
82°
57°
1
77°
55°
2
76°
54°
3
Hist. Avg.
78°
54°
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 76° to 92°, with overnight lows between 54° and 69°. The average high for September is 85° with an average low of 63°. 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.