S
M
T
W
T
F
S
30
90°
66°
31
89°
65°
1
88°
62°
2
87°
57°
3
80°
56°
4
80°
62°
5
85°
63°
6
86°
61°
7
87°
62°
8
85°
61°
9
85°
62°
10
84°
60°
11
80°
54°
12
78°
54°
13
78°
58°
14
81°
60°
15
81°
60°
16
78°
59°
17
77°
58°
18
75°
50°
19
75°
49°
20
73°
51°
21
74°
51°
22
75°
56°
23
77°
57°
24
80°
58°
25
81°
51°
26
80°
49°
27
73°
51°
28
71°
48°
29
71°
47°
30
71°
55°
1
70°
50°
2
Hist. Avg.
75°
51°
3
Hist. Avg.
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Summersville
Summersville's September 2026 forecast shows daily high temperatures ranging from 70° to 90°, with overnight lows between 47° and 66°. The average high for September is 80° with an average low of 56°. 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 Summersville. See also: October | November | December.
