S
M
T
W
T
F
S
26
63°
39°
27
67°
48°
28
62°
49°
29
58°
38°
30
57°
35°
1
52°
34°
2
57°
29°
3
68°
43°
4
80°
43°
5
62°
42°
6
58°
40°
7
59°
46°
8
60°
46°
9
76°
51°
10
60°
41°
11
60°
42°
12
60°
46°
13
68°
49°
14
67°
51°
15
70°
50°
16
67°
47°
17
66°
48°
18
71°
50°
19
71°
53°
20
71°
53°
21
69°
44°
22
65°
44°
23
65°
46°
24
67°
45°
25
67°
46°
26
68°
47°
27
67°
47°
28
68°
48°
29
69°
52°
30
70°
57°
31
75°
53°
1
71°
53°
2
74°
58°
3
77°
58°
4
79°
59°
5
79°
60°
6
81°
61°
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 58° to 81°, with overnight lows between 40° and 61°. 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 Wheaton. See also: June | July | August.
