S
M
T
W
T
F
S
30
86°
67°
31
82°
65°
1
80°
67°
2
81°
66°
3
85°
67°
4
84°
67°
5
81°
66°
6
81°
65°
7
86°
64°
8
82°
59°
9
81°
57°
10
80°
63°
11
79°
59°
12
84°
58°
13
84°
64°
14
83°
58°
15
82°
56°
16
76°
57°
17
77°
56°
18
80°
57°
19
83°
57°
20
83°
59°
21
82°
61°
22
83°
60°
23
82°
55°
24
79°
54°
25
81°
53°
26
81°
59°
27
80°
59°
28
80°
58°
29
81°
59°
30
81°
56°
1
75°
58°
2
79°
58°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Southmont
Southmont's September 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 53° and 67°. The average high for September is 81° with an average low of 60°. 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 Southmont. See also: October | November | December.