S
M
T
W
T
F
S
26
85°
64°
27
87°
58°
28
73°
66°
29
74°
65°
30
79°
64°
31
85°
60°
1
88°
56°
2
77°
65°
3
73°
53°
4
83°
58°
5
83°
66°
6
81°
65°
7
78°
60°
8
79°
61°
9
81°
58°
10
75°
56°
11
73°
55°
12
72°
53°
13
74°
55°
14
73°
56°
15
71°
55°
16
69°
51°
17
77°
55°
18
70°
52°
19
70°
57°
20
71°
52°
21
70°
50°
22
70°
55°
23
76°
58°
24
75°
58°
25
72°
57°
26
73°
58°
27
72°
57°
28
69°
57°
29
73°
56°
30
72°
57°
31
74°
54°
1
71°
50°
2
66°
47°
3
65°
47°
4
66°
48°
5
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Boonville
Boonville's August 2026 forecast shows daily high temperatures ranging from 65° to 83°, with overnight lows between 47° and 66°. The average high for August is 73° with an average low of 55°. 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 Boonville. See also: September | October | November.