S
M
T
W
T
F
S
26
52°
41°
27
59°
49°
28
62°
44°
29
52°
38°
30
49°
36°
1
45°
35°
2
51°
41°
3
60°
44°
4
56°
46°
5
52°
40°
6
54°
40°
7
56°
41°
8
57°
42°
9
56°
41°
10
64°
44°
11
58°
46°
12
58°
44°
13
59°
40°
14
57°
40°
15
58°
42°
16
62°
45°
17
63°
49°
18
70°
52°
19
69°
47°
20
64°
45°
21
61°
44°
22
62°
44°
23
68°
53°
24
72°
54°
25
73°
53°
26
67°
49°
27
64°
48°
28
69°
54°
29
74°
55°
30
75°
55°
31
74°
56°
1
75°
56°
2
77°
58°
3
77°
57°
4
73°
52°
5
66°
51°
6
69°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mequon
Mequon's May 2026 forecast shows daily high temperatures ranging from 45° to 77°, with overnight lows between 35° and 58°. The average high for May is 63° with an average low of 47°. 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 Mequon. See also: June | July | August.
