S
M
T
W
T
F
S
26
50°
31°
27
50°
33°
28
48°
29°
29
52°
32°
30
52°
33°
1
50°
34°
2
49°
32°
3
58°
35°
4
58°
36°
5
59°
33°
6
62°
35°
7
53°
34°
8
50°
35°
9
53°
40°
10
53°
39°
11
58°
43°
12
65°
42°
13
55°
37°
14
55°
35°
15
62°
42°
16
65°
46°
17
66°
43°
18
65°
36°
19
55°
35°
20
58°
39°
21
59°
47°
22
64°
47°
23
68°
50°
24
70°
50°
25
70°
48°
26
62°
41°
27
61°
41°
28
62°
45°
29
64°
48°
30
62°
47°
31
63°
46°
1
67°
45°
2
70°
42°
3
66°
44°
4
69°
43°
5
67°
40°
6
68°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Clam Lake
Clam Lake's May 2026 forecast shows daily high temperatures ranging from 48° to 70°, with overnight lows between 29° and 50°. The average high for May is 60° with an average low of 40°. 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 Clam Lake. See also: June | July | August.