S
M
T
W
T
F
S
26
79°
60°
27
80°
61°
28
80°
66°
29
79°
65°
30
83°
65°
31
84°
62°
1
86°
65°
2
73°
64°
3
82°
64°
4
78°
59°
5
83°
56°
6
85°
69°
7
80°
68°
8
80°
67°
9
81°
64°
10
80°
65°
11
83°
61°
12
78°
59°
13
82°
59°
14
79°
59°
15
78°
54°
16
79°
67°
17
82°
58°
18
79°
65°
19
77°
55°
20
77°
54°
21
75°
58°
22
76°
59°
23
77°
58°
24
73°
55°
25
79°
60°
26
78°
58°
27
79°
59°
28
78°
60°
29
79°
55°
30
75°
59°
31
68°
50°
1
68°
52°
2
71°
58°
3
70°
58°
4
68°
57°
5
69°
53°
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 68° to 82°, with overnight lows between 50° and 67°. The average high for August is 75° with an average low of 58°. 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.
