S
M
T
W
T
F
S
28
80°
65°
29
90°
64°
30
92°
64°
1
97°
70°
2
99°
73°
3
98°
73°
4
92°
69°
5
83°
68°
6
78°
65°
7
78°
60°
8
81°
62°
9
84°
64°
10
85°
63°
11
87°
63°
12
86°
63°
13
85°
62°
14
86°
63°
15
87°
62°
16
79°
58°
17
80°
59°
18
82°
59°
19
86°
65°
20
85°
65°
21
80°
64°
22
84°
65°
23
85°
65°
24
84°
64°
25
84°
63°
26
86°
65°
27
87°
65°
28
86°
66°
29
87°
65°
30
88°
66°
31
87°
66°
1
83°
65°
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 78° to 99°, with overnight lows between 58° and 73°. The average high for July is 85° with an average low of 64°. 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.