S
M
T
W
T
F
S
26
91°
72°
27
88°
65°
28
88°
66°
29
89°
69°
30
93°
70°
31
92°
73°
1
95°
67°
2
91°
67°
3
87°
68°
4
86°
65°
5
87°
66°
6
87°
66°
7
88°
67°
8
88°
69°
9
89°
71°
10
88°
69°
11
90°
72°
12
90°
72°
13
94°
71°
14
94°
66°
15
93°
70°
16
88°
70°
17
89°
71°
18
92°
68°
19
93°
66°
20
91°
66°
21
91°
67°
22
89°
66°
23
90°
67°
24
91°
70°
25
92°
68°
26
92°
69°
27
91°
69°
28
91°
68°
29
87°
69°
30
88°
69°
31
89°
68°
1
88°
67°
2
90°
67°
3
86°
66°
4
89°
61°
5
81°
60°
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 81° to 95°, with overnight lows between 60° and 73°. The average high for August is 90° with an average low of 68°. 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.
