S
M
T
W
T
F
S
26
79°
63°
27
81°
62°
28
81°
64°
29
80°
63°
30
81°
64°
31
80°
63°
1
79°
62°
2
74°
60°
3
74°
60°
4
75°
62°
5
77°
62°
6
78°
63°
7
80°
63°
8
81°
62°
9
81°
63°
10
80°
63°
11
81°
62°
12
81°
62°
13
80°
63°
14
82°
61°
15
83°
62°
16
78°
63°
17
80°
62°
18
82°
62°
19
79°
57°
20
80°
53°
21
72°
51°
22
71°
52°
23
72°
56°
24
74°
53°
25
73°
50°
26
71°
54°
27
71°
53°
28
70°
51°
29
70°
50°
30
71°
49°
31
69°
49°
1
69°
51°
2
70°
52°
3
70°
52°
4
67°
51°
5
69°
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 67° to 83°, with overnight lows between 49° and 64°. The average high for August is 76° 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.
