S
M
T
W
T
F
S
28
80°
62°
29
80°
60°
30
81°
59°
1
80°
64°
2
84°
66°
3
86°
66°
4
83°
61°
5
80°
59°
6
80°
62°
7
82°
66°
8
81°
67°
9
81°
67°
10
82°
66°
11
85°
62°
12
82°
60°
13
90°
60°
14
83°
59°
15
82°
59°
16
83°
60°
17
85°
61°
18
83°
68°
19
85°
60°
20
85°
66°
21
88°
61°
22
88°
59°
23
82°
60°
24
85°
61°
25
83°
66°
26
85°
67°
27
88°
64°
28
88°
67°
29
87°
68°
30
87°
67°
31
89°
59°
1
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Belleville
Belleville's July 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 59° and 68°. The average high for July is 84° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Belleville. See also: August | September | October.