S
M
T
W
T
F
S
26
98°
75°
27
98°
75°
28
91°
76°
29
87°
68°
30
87°
63°
31
80°
70°
1
78°
67°
2
83°
65°
3
86°
62°
4
89°
63°
5
88°
67°
6
76°
68°
7
90°
68°
8
90°
66°
9
93°
72°
10
92°
75°
11
95°
75°
12
92°
73°
13
95°
74°
14
94°
77°
15
92°
78°
16
91°
73°
17
84°
68°
18
86°
64°
19
80°
70°
20
85°
68°
21
88°
64°
22
86°
66°
23
82°
59°
24
82°
56°
25
87°
64°
26
93°
67°
27
85°
63°
28
86°
60°
29
87°
66°
30
94°
68°
31
97°
72°
1
98°
73°
2
98°
74°
3
95°
73°
4
94°
72°
5
97°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ballwin
Ballwin's August 2026 forecast shows daily high temperatures ranging from 86° to 98°, with overnight lows between 60° and 74°. The average high for August is 94° with an average low of 70°. 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 Ballwin. See also: September | October | November.
