S
M
T
W
T
F
S
29
70°
50°
30
73°
59°
31
79°
61°
1
80°
62°
2
82°
60°
3
82°
64°
4
81°
64°
5
64°
46°
6
66°
41°
7
68°
39°
8
73°
41°
9
75°
52°
10
78°
49°
11
82°
53°
12
87°
62°
13
79°
62°
14
86°
62°
15
86°
63°
16
84°
62°
17
82°
61°
18
85°
60°
19
79°
61°
20
78°
60°
21
82°
61°
22
84°
62°
23
73°
49°
24
76°
56°
25
73°
55°
26
73°
54°
27
74°
54°
28
76°
55°
29
77°
56°
30
77°
57°
1
76°
57°
2
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Belvidere
Belvidere's April 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 49° and 63°. The average high for April is 79° 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 April weather will actually feel in Belvidere. See also: May | June | July.