S
M
T
W
T
F
S
26
61°
44°
27
66°
45°
28
64°
49°
29
55°
41°
30
53°
36°
1
48°
37°
2
58°
34°
3
67°
46°
4
77°
49°
5
57°
43°
6
54°
37°
7
58°
35°
8
68°
36°
9
68°
47°
10
62°
38°
11
58°
38°
12
72°
38°
13
62°
47°
14
72°
41°
15
80°
59°
16
82°
56°
17
73°
65°
18
79°
67°
19
73°
43°
20
60°
40°
21
66°
44°
22
69°
48°
23
75°
54°
24
78°
55°
25
73°
52°
26
77°
56°
27
76°
54°
28
73°
53°
29
74°
52°
30
77°
57°
31
78°
56°
1
78°
58°
2
77°
57°
3
70°
53°
4
70°
52°
5
73°
58°
6
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Mills
Lake Mills's May 2026 forecast shows daily high temperatures ranging from 60° to 82°, with overnight lows between 40° and 67°. The average high for May is 74° with an average low of 54°. 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 Lake Mills. See also: June | July | August.