S
M
T
W
T
F
S
26
87°
67°
27
87°
66°
28
86°
65°
29
87°
65°
30
86°
63°
31
81°
59°
1
80°
64°
2
78°
64°
3
80°
63°
4
83°
65°
5
85°
65°
6
85°
64°
7
80°
60°
8
77°
62°
9
78°
62°
10
79°
63°
11
82°
64°
12
84°
65°
13
85°
63°
14
86°
64°
15
85°
63°
16
87°
57°
17
84°
55°
18
77°
53°
19
75°
52°
20
76°
53°
21
77°
53°
22
77°
54°
23
78°
54°
24
77°
56°
25
79°
60°
26
83°
53°
27
76°
53°
28
75°
52°
29
77°
57°
30
80°
60°
31
81°
51°
1
78°
49°
2
73°
50°
3
74°
54°
4
76°
59°
5
81°
49°
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 73° to 87°, with overnight lows between 49° and 67°. The average high for August is 81° with an average low of 59°. 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.
