S
M
T
W
T
F
S
26
86°
65°
27
86°
66°
28
85°
65°
29
83°
65°
30
83°
64°
31
86°
66°
1
87°
66°
2
85°
64°
3
87°
65°
4
87°
65°
5
86°
61°
6
81°
64°
7
83°
59°
8
79°
60°
9
78°
58°
10
78°
58°
11
81°
63°
12
87°
65°
13
86°
62°
14
86°
57°
15
80°
57°
16
81°
64°
17
82°
63°
18
80°
57°
19
79°
57°
20
81°
58°
21
82°
59°
22
85°
59°
23
85°
60°
24
84°
61°
25
85°
62°
26
83°
63°
27
84°
60°
28
83°
62°
29
85°
62°
30
84°
55°
31
78°
52°
1
77°
53°
2
76°
54°
3
76°
53°
4
77°
53°
5
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Belleville
Belleville's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 52° and 66°. The average high for August is 82° with an average low of 60°. 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 Belleville. See also: September | October | November.
