S
M
T
W
T
F
S
26
68°
38°
27
71°
51°
28
64°
49°
29
59°
35°
30
58°
33°
1
51°
34°
2
57°
42°
3
62°
45°
4
74°
45°
5
55°
40°
6
54°
34°
7
53°
36°
8
62°
44°
9
64°
43°
10
64°
46°
11
63°
46°
12
66°
45°
13
65°
46°
14
69°
49°
15
63°
46°
16
63°
44°
17
64°
53°
18
70°
53°
19
66°
52°
20
70°
54°
21
72°
54°
22
68°
53°
23
72°
49°
24
65°
47°
25
65°
49°
26
68°
55°
27
71°
53°
28
68°
51°
29
68°
48°
30
70°
49°
31
69°
48°
1
69°
55°
2
78°
53°
3
69°
50°
4
70°
49°
5
70°
50°
6
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Belvidere
Belvidere's May 2026 forecast shows daily high temperatures ranging from 51° to 78°, with overnight lows between 34° and 55°. The average high for May is 66° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Belvidere. See also: June | July | August.
