S
M
T
W
T
F
S
26
65°
42°
27
67°
41°
28
62°
36°
29
54°
31°
30
55°
32°
1
55°
33°
2
56°
31°
3
56°
31°
4
58°
33°
5
58°
34°
6
59°
33°
7
59°
33°
8
60°
34°
9
66°
35°
10
70°
40°
11
71°
42°
12
71°
44°
13
68°
44°
14
69°
41°
15
66°
38°
16
62°
36°
17
61°
36°
18
63°
37°
19
66°
42°
20
67°
39°
21
63°
39°
22
64°
44°
23
64°
42°
24
63°
39°
25
63°
39°
26
64°
40°
27
65°
48°
28
67°
45°
29
73°
49°
30
74°
46°
31
67°
41°
1
68°
44°
2
67°
40°
3
68°
42°
4
67°
42°
5
69°
44°
6
72°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Diamond Lake
Diamond Lake's May 2026 forecast shows daily high temperatures ranging from 54° to 74°, with overnight lows between 31° and 49°. The average high for May is 64° with an average low of 39°. 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 Diamond Lake. See also: June | July | August.
