S
M
T
W
T
F
S
30
88°
69°
31
90°
68°
1
85°
65°
2
85°
68°
3
90°
65°
4
91°
69°
5
91°
69°
6
88°
68°
7
90°
63°
8
84°
63°
9
85°
62°
10
84°
62°
11
86°
63°
12
88°
62°
13
86°
66°
14
87°
63°
15
86°
66°
16
87°
66°
17
86°
59°
18
81°
59°
19
79°
60°
20
79°
65°
21
80°
62°
22
81°
60°
23
80°
63°
24
79°
63°
25
79°
62°
26
82°
63°
27
84°
62°
28
83°
61°
29
79°
61°
30
78°
60°
1
77°
61°
2
79°
57°
3
80°
53°
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 77° to 91°, with overnight lows between 53° and 69°. The average high for September is 84° 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.