S
M
T
W
T
F
S
26
57°
39°
27
72°
36°
28
58°
50°
29
56°
50°
30
N/A
1
58°
40°
2
55°
35°
3
55°
38°
4
68°
49°
5
73°
51°
6
62°
42°
7
56°
36°
8
55°
37°
9
58°
42°
10
64°
43°
11
63°
47°
12
66°
48°
13
66°
47°
14
65°
48°
15
66°
50°
16
65°
50°
17
66°
49°
18
67°
54°
19
74°
54°
20
75°
53°
21
76°
55°
22
76°
56°
23
75°
55°
24
75°
52°
25
69°
48°
26
70°
56°
27
69°
56°
28
75°
57°
29
75°
56°
30
73°
55°
31
73°
52°
1
71°
49°
2
68°
50°
3
69°
49°
4
70°
49°
5
70°
50°
6
71°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Belleville
Belleville's May 2026 forecast shows daily high temperatures ranging from 55° to 76°, with overnight lows between 35° and 57°. The average high for May is 68° with an average low of 49°. 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 Belleville. See also: June | July | August.
