S
M
T
W
T
F
S
26
85°
64°
27
89°
64°
28
89°
67°
29
82°
65°
30
68°
61°
1
63°
52°
2
71°
49°
3
76°
45°
4
80°
47°
5
83°
53°
6
84°
69°
7
74°
61°
8
67°
61°
9
69°
64°
10
84°
64°
11
82°
67°
12
82°
65°
13
83°
62°
14
83°
59°
15
87°
55°
16
84°
62°
17
86°
60°
18
90°
65°
19
89°
69°
20
86°
71°
21
85°
71°
22
82°
70°
23
82°
71°
24
85°
70°
25
86°
69°
26
84°
70°
27
85°
68°
28
87°
69°
29
86°
67°
30
86°
67°
31
88°
66°
1
91°
65°
2
90°
68°
3
86°
67°
4
87°
67°
5
87°
68°
6
86°
69°
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 82° to 91°, with overnight lows between 65° and 71°. The average high for May is 86° with an average low of 69°. 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.
