S
M
T
W
T
F
S
26
61°
41°
27
70°
35°
28
62°
38°
29
61°
48°
30
59°
46°
1
63°
35°
2
57°
43°
3
60°
40°
4
72°
35°
5
82°
53°
6
66°
51°
7
63°
45°
8
61°
38°
9
58°
49°
10
70°
48°
11
62°
46°
12
67°
34°
13
68°
47°
14
61°
49°
15
67°
42°
16
81°
59°
17
84°
55°
18
90°
62°
19
95°
66°
20
82°
51°
21
66°
42°
22
67°
46°
23
72°
48°
24
76°
48°
25
73°
53°
26
77°
54°
27
78°
56°
28
76°
50°
29
68°
50°
30
69°
54°
31
75°
52°
1
69°
50°
2
70°
48°
3
69°
48°
4
70°
49°
5
71°
56°
6
76°
57°
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 66° to 95°, with overnight lows between 42° and 66°. The average high for May is 75° with an average low of 52°. 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.
