S
M
T
W
T
F
S
30
92°
69°
31
93°
70°
1
92°
69°
2
92°
69°
3
91°
70°
4
91°
66°
5
90°
69°
6
92°
70°
7
91°
69°
8
90°
68°
9
90°
69°
10
91°
69°
11
90°
68°
12
89°
66°
13
86°
67°
14
88°
67°
15
86°
66°
16
85°
67°
17
85°
65°
18
86°
64°
19
85°
66°
20
85°
61°
21
83°
60°
22
84°
61°
23
85°
64°
24
86°
63°
25
87°
64°
26
86°
65°
27
87°
64°
28
83°
63°
29
83°
60°
30
85°
61°
1
Hist. Avg.
83°
62°
2
Hist. Avg.
83°
61°
3
Hist. Avg.
82°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Shellhorn
Shellhorn's September 2026 forecast shows daily high temperatures ranging from 83° to 93°, with overnight lows between 60° and 70°. The average high for September is 88° with an average low of 66°. 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 Shellhorn. See also: October | November | December.