S
M
T
W
T
F
S
26
79°
55°
27
82°
57°
28
63°
50°
29
61°
45°
30
63°
43°
1
63°
43°
2
63°
41°
3
79°
43°
4
79°
61°
5
61°
45°
6
61°
45°
7
66°
37°
8
77°
52°
9
81°
50°
10
68°
48°
11
73°
43°
12
77°
54°
13
73°
57°
14
77°
52°
15
82°
59°
16
86°
66°
17
81°
64°
18
81°
68°
19
71°
54°
20
62°
57°
21
71°
59°
22
75°
60°
23
76°
60°
24
78°
61°
25
79°
64°
26
78°
65°
27
80°
65°
28
79°
64°
29
78°
60°
30
80°
61°
31
79°
59°
1
82°
64°
2
81°
63°
3
76°
60°
4
75°
58°
5
79°
64°
6
82°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Wheaton
Wheaton's May 2026 forecast shows daily high temperatures ranging from 62° to 82°, with overnight lows between 54° and 68°. The average high for May is 77° with an average low of 62°. 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 Wheaton. See also: June | July | August.
