S
M
T
W
T
F
S
30
82°
57°
31
82°
62°
1
83°
57°
2
81°
55°
3
80°
53°
4
78°
55°
5
80°
55°
6
82°
61°
7
84°
63°
8
86°
62°
9
87°
56°
10
79°
54°
11
80°
61°
12
82°
61°
13
85°
52°
14
78°
51°
15
77°
52°
16
79°
54°
17
82°
53°
18
81°
56°
19
83°
57°
20
83°
56°
21
84°
58°
22
83°
58°
23
80°
57°
24
80°
58°
25
78°
56°
26
82°
57°
27
82°
56°
28
81°
55°
29
81°
55°
30
80°
56°
1
81°
54°
2
81°
46°
3
80°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Shell Knob
Shell Knob's September 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 46° and 63°. The average high for September is 81° 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 Shell Knob. See also: October | November | December.