S
M
T
W
T
F
S
26
91°
70°
27
90°
66°
28
93°
70°
29
92°
71°
30
94°
71°
31
93°
70°
1
94°
72°
2
95°
72°
3
95°
71°
4
94°
71°
5
94°
70°
6
93°
72°
7
95°
71°
8
94°
72°
9
95°
70°
10
93°
69°
11
92°
70°
12
92°
70°
13
93°
68°
14
86°
65°
15
85°
62°
16
85°
61°
17
86°
64°
18
87°
65°
19
87°
66°
20
91°
67°
21
91°
67°
22
90°
66°
23
87°
67°
24
93°
65°
25
91°
66°
26
84°
66°
27
85°
61°
28
87°
57°
29
83°
58°
30
82°
57°
31
82°
62°
1
83°
57°
2
81°
55°
3
80°
53°
4
78°
55°
5
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Shell Knob
Shell Knob's August 2026 forecast shows daily high temperatures ranging from 78° to 95°, with overnight lows between 53° and 72°. The average high for August is 89° 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 August weather will actually feel in Shell Knob. See also: September | October | November.