S
M
T
W
T
F
S
30
80°
58°
31
80°
58°
1
78°
57°
2
76°
58°
3
73°
56°
4
72°
51°
5
73°
53°
6
75°
58°
7
77°
54°
8
75°
56°
9
74°
57°
10
72°
56°
11
72°
51°
12
70°
52°
13
70°
53°
14
72°
54°
15
73°
54°
16
75°
53°
17
75°
53°
18
74°
52°
19
73°
51°
20
68°
45°
21
66°
46°
22
67°
46°
23
71°
50°
24
73°
51°
25
72°
52°
26
71°
45°
27
67°
45°
28
66°
43°
29
65°
42°
30
64°
43°
1
Hist. Avg.
70°
49°
2
Hist. Avg.
69°
48°
3
Hist. Avg.
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Appalachia
Appalachia's September 2026 forecast shows daily high temperatures ranging from 64° to 80°, with overnight lows between 42° and 58°. The average high for September is 72° with an average low of 52°. 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 Appalachia. See also: October | November | December.
