S
M
T
W
T
F
S
30
76°
60°
31
76°
58°
1
77°
62°
2
79°
64°
3
80°
65°
4
83°
64°
5
81°
65°
6
82°
64°
7
79°
63°
8
77°
62°
9
77°
63°
10
75°
63°
11
75°
62°
12
74°
61°
13
76°
60°
14
78°
61°
15
79°
60°
16
77°
60°
17
77°
61°
18
74°
61°
19
75°
60°
20
78°
60°
21
79°
58°
22
79°
52°
23
78°
49°
24
70°
52°
25
74°
50°
26
77°
53°
27
74°
57°
28
76°
58°
29
80°
58°
30
80°
57°
1
77°
56°
2
76°
55°
3
75°
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 70° to 83°, with overnight lows between 49° and 65°. The average high for September is 77° with an average low of 59°. 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.
