S
M
T
W
T
F
S
29
37°
7°
30
56°
30°
31
36°
27°
1
34°
27°
2
40°
24°
3
39°
28°
4
39°
29°
5
38°
30°
6
39°
27°
7
39°
21°
8
42°
17°
9
55°
22°
10
63°
36°
11
42°
32°
12
52°
31°
13
48°
37°
14
57°
44°
15
49°
42°
16
56°
44°
17
62°
39°
18
60°
42°
19
48°
30°
20
43°
20°
21
44°
27°
22
48°
29°
23
46°
30°
24
46°
32°
25
49°
35°
26
51°
33°
27
53°
36°
28
52°
36°
29
56°
42°
30
50°
36°
1
51°
36°
2
51°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Belleville
Belleville's April 2026 forecast shows daily high temperatures ranging from 43° to 62°, with overnight lows between 20° and 44°. The average high for April is 51° with an average low of 34°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Belleville. See also: May | June | July.