S
M
T
W
T
F
S
30
82°
49°
31
72°
48°
1
72°
56°
2
76°
55°
3
73°
48°
4
76°
56°
5
80°
47°
6
75°
48°
7
71°
47°
8
70°
44°
9
70°
46°
10
71°
50°
11
73°
44°
12
70°
43°
13
69°
44°
14
72°
49°
15
74°
45°
16
72°
42°
17
67°
41°
18
66°
40°
19
65°
42°
20
66°
46°
21
64°
46°
22
64°
41°
23
66°
48°
24
67°
42°
25
70°
49°
26
72°
49°
27
72°
40°
28
67°
39°
29
63°
46°
30
66°
47°
1
62°
48°
2
65°
45°
3
64°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Swain
Swain's September 2026 forecast shows daily high temperatures ranging from 62° to 82°, with overnight lows between 39° and 56°. The average high for September is 70° with an average low of 46°. 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 Swain. See also: October | November | December.