S
M
T
W
T
F
S
26
70°
46°
27
64°
43°
28
54°
37°
29
54°
37°
30
52°
36°
1
52°
32°
2
64°
43°
3
69°
46°
4
68°
36°
5
53°
33°
6
50°
35°
7
55°
35°
8
61°
41°
9
68°
41°
10
67°
45°
11
68°
45°
12
73°
49°
13
72°
48°
14
66°
47°
15
69°
46°
16
72°
54°
17
73°
53°
18
72°
53°
19
74°
50°
20
70°
50°
21
68°
45°
22
64°
44°
23
65°
45°
24
66°
45°
25
65°
46°
26
66°
46°
27
66°
47°
28
67°
48°
29
69°
56°
30
68°
54°
31
69°
51°
1
72°
53°
2
75°
56°
3
76°
58°
4
79°
59°
5
79°
60°
6
77°
61°
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 50° to 79°, with overnight lows between 33° and 61°. The average high for May is 68° 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 Lake Mills. See also: June | July | August.