S
M
T
W
T
F
S
30
72°
57°
31
75°
61°
1
78°
61°
2
78°
60°
3
77°
54°
4
76°
52°
5
70°
53°
6
70°
58°
7
71°
58°
8
75°
56°
9
76°
57°
10
71°
58°
11
75°
57°
12
76°
57°
13
75°
58°
14
73°
58°
15
76°
57°
16
76°
53°
17
74°
56°
18
72°
50°
19
73°
49°
20
67°
47°
21
65°
45°
22
65°
53°
23
66°
49°
24
70°
46°
25
64°
45°
26
64°
45°
27
66°
47°
28
70°
51°
29
69°
49°
30
70°
47°
1
63°
50°
2
63°
42°
3
61°
48°
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 61° to 78°, with overnight lows between 42° and 61°. The average high for September is 71° with an average low of 53°. 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.
