S
M
T
W
T
F
S
26
68°
41°
27
70°
49°
28
57°
47°
29
50°
41°
30
49°
31°
1
48°
38°
2
49°
43°
3
55°
43°
4
66°
47°
5
55°
39°
6
54°
39°
7
48°
40°
8
52°
44°
9
57°
43°
10
59°
44°
11
58°
44°
12
57°
45°
13
62°
49°
14
63°
49°
15
61°
45°
16
66°
53°
17
69°
51°
18
62°
47°
19
67°
53°
20
64°
53°
21
65°
43°
22
63°
43°
23
61°
44°
24
63°
44°
25
63°
45°
26
64°
45°
27
63°
46°
28
64°
45°
29
64°
47°
30
66°
55°
31
69°
52°
1
67°
51°
2
68°
52°
3
70°
57°
4
72°
57°
5
74°
58°
6
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Muskegon
Muskegon's May 2026 forecast shows daily high temperatures ranging from 48° to 75°, with overnight lows between 39° and 59°. The average high for May is 63° with an average low of 48°. 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 Muskegon. See also: June | July | August.