S
M
T
W
T
F
S
30
67°
49°
31
71°
45°
1
69°
43°
2
65°
44°
3
65°
43°
4
63°
43°
5
63°
41°
6
64°
48°
7
66°
48°
8
69°
45°
9
68°
46°
10
62°
48°
11
65°
47°
12
67°
47°
13
68°
46°
14
67°
41°
15
67°
40°
16
60°
39°
17
59°
39°
18
59°
43°
19
62°
46°
20
64°
45°
21
64°
44°
22
63°
39°
23
58°
43°
24
62°
44°
25
59°
43°
26
60°
42°
27
60°
39°
28
55°
37°
29
56°
38°
30
54°
35°
1
53°
36°
2
52°
36°
3
57°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Middle Arm
Middle Arm's September 2026 forecast shows daily high temperatures ranging from 52° to 71°, with overnight lows between 35° and 49°. The average high for September is 62° with an average low of 43°. 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 Middle Arm. See also: October | November | December.