S
M
T
W
T
F
S
26
55°
39°
27
59°
40°
28
63°
45°
29
45°
38°
30
48°
35°
1
42°
33°
2
47°
43°
3
57°
45°
4
63°
41°
5
50°
40°
6
48°
38°
7
49°
39°
8
55°
46°
9
54°
43°
10
57°
46°
11
55°
44°
12
57°
46°
13
58°
45°
14
61°
46°
15
57°
44°
16
57°
43°
17
58°
50°
18
59°
51°
19
61°
50°
20
63°
51°
21
61°
48°
22
59°
48°
23
60°
46°
24
58°
43°
25
59°
48°
26
60°
52°
27
62°
52°
28
61°
50°
29
61°
47°
30
65°
46°
31
61°
46°
1
61°
49°
2
64°
49°
3
62°
48°
4
63°
47°
5
64°
47°
6
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sheboygan
Sheboygan's May 2026 forecast shows daily high temperatures ranging from 42° to 65°, with overnight lows between 33° and 52°. The average high for May is 58° with an average low of 46°. 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 Sheboygan. See also: June | July | August.