S
M
T
W
T
F
S
26
91°
72°
27
93°
72°
28
91°
71°
29
90°
71°
30
89°
70°
31
87°
69°
1
84°
69°
2
86°
70°
3
89°
70°
4
88°
67°
5
89°
69°
6
88°
70°
7
89°
70°
8
82°
69°
9
83°
68°
10
83°
68°
11
84°
67°
12
86°
69°
13
88°
70°
14
88°
70°
15
90°
71°
16
91°
70°
17
89°
70°
18
90°
69°
19
91°
70°
20
90°
70°
21
81°
59°
22
80°
61°
23
82°
60°
24
81°
62°
25
83°
67°
26
88°
68°
27
90°
68°
28
91°
69°
29
91°
66°
30
90°
59°
31
81°
64°
1
81°
63°
2
88°
66°
3
89°
68°
4
90°
66°
5
90°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cottleville
Cottleville's August 2026 forecast shows daily high temperatures ranging from 80° to 93°, with overnight lows between 59° and 72°. The average high for August is 87° with an average low of 68°. 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 Cottleville. See also: September | October | November.