S
M
T
W
T
F
S
30
90°
71°
31
94°
73°
1
99°
74°
2
97°
73°
3
93°
74°
4
90°
74°
5
92°
74°
6
93°
71°
7
92°
72°
8
91°
72°
9
94°
72°
10
92°
71°
11
90°
70°
12
90°
69°
13
89°
68°
14
93°
73°
15
89°
70°
16
87°
69°
17
84°
69°
18
84°
68°
19
85°
69°
20
83°
68°
21
84°
68°
22
83°
67°
23
86°
68°
24
86°
67°
25
88°
68°
26
85°
66°
27
84°
67°
28
87°
67°
29
83°
66°
30
81°
67°
1
81°
66°
2
82°
66°
3
81°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Shell Heights
Shell Heights's September 2026 forecast shows daily high temperatures ranging from 81° to 99°, with overnight lows between 65° and 74°. The average high for September is 88° with an average low of 69°. 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 Shell Heights. See also: October | November | December.