S
M
T
W
T
F
S
30
70°
55°
31
71°
54°
1
71°
55°
2
70°
55°
3
71°
52°
4
70°
54°
5
70°
54°
6
71°
53°
7
71°
54°
8
69°
54°
9
69°
51°
10
68°
49°
11
69°
53°
12
68°
53°
13
68°
51°
14
65°
52°
15
67°
52°
16
66°
51°
17
67°
47°
18
65°
51°
19
63°
52°
20
67°
52°
21
66°
50°
22
66°
51°
23
62°
47°
24
63°
51°
25
Hist. Avg.
62°
50°
26
Hist. Avg.
62°
50°
27
Hist. Avg.
62°
50°
28
Hist. Avg.
62°
49°
29
Hist. Avg.
61°
49°
30
Hist. Avg.
61°
49°
1
Hist. Avg.
61°
49°
2
Hist. Avg.
61°
49°
3
Hist. Avg.
61°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Sully
Sully's September 2026 forecast shows daily high temperatures ranging from 62° to 71°, with overnight lows between 47° and 55°. The average high for September is 68° with an average low of 52°. 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 Sully. See also: October | November | December.