S
M
T
W
T
F
S
30
86°
69°
31
90°
70°
1
95°
75°
2
93°
72°
3
94°
73°
4
97°
74°
5
93°
70°
6
81°
60°
7
82°
58°
8
87°
60°
9
88°
71°
10
80°
67°
11
82°
58°
12
82°
69°
13
86°
60°
14
76°
51°
15
92°
61°
16
92°
71°
17
90°
69°
18
80°
69°
19
87°
68°
20
86°
64°
21
65°
58°
22
63°
56°
23
64°
58°
24
67°
52°
25
70°
51°
26
72°
50°
27
72°
50°
28
74°
51°
29
75°
59°
30
70°
61°
1
74°
58°
2
75°
57°
3
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Southeast
Southeast's September 2026 forecast shows daily high temperatures ranging from 67° to 75°, with overnight lows between 50° and 61°. The average high for September is 72° with an average low of 54°. 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 Southeast. See also: October | November | December.
