S
M
T
W
T
F
S
30
91°
56°
31
94°
57°
1
93°
57°
2
90°
54°
3
88°
55°
4
88°
55°
5
89°
56°
6
90°
55°
7
89°
54°
8
89°
56°
9
88°
58°
10
88°
60°
11
89°
58°
12
91°
59°
13
91°
62°
14
94°
61°
15
95°
60°
16
95°
59°
17
93°
58°
18
93°
57°
19
92°
58°
20
88°
57°
21
92°
59°
22
92°
58°
23
91°
58°
24
87°
57°
25
82°
57°
26
81°
55°
27
82°
56°
28
83°
57°
29
84°
56°
30
82°
57°
1
85°
55°
2
81°
54°
3
81°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McSwain
McSwain's September 2026 forecast shows daily high temperatures ranging from 81° to 95°, with overnight lows between 54° and 62°. The average high for September is 89° with an average low of 57°. 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 McSwain. See also: October | November | December.