S
M
T
W
T
F
S
26
54°
29°
27
57°
23°
28
63°
24°
29
67°
25°
30
71°
32°
1
76°
34°
2
73°
41°
3
74°
46°
4
77°
34°
5
76°
40°
6
79°
36°
7
78°
33°
8
74°
33°
9
79°
33°
10
82°
36°
11
84°
37°
12
82°
39°
13
61°
33°
14
73°
26°
15
67°
30°
16
55°
34°
17
58°
34°
18
65°
26°
19
71°
30°
20
74°
32°
21
76°
42°
22
81°
43°
23
81°
44°
24
80°
45°
25
70°
32°
26
52°
36°
27
66°
45°
28
70°
45°
29
57°
32°
30
63°
27°
31
67°
33°
1
74°
37°
2
76°
39°
3
77°
35°
4
73°
36°
5
71°
34°
6
69°
36°
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 52° to 77°, with overnight lows between 27° and 45°. The average high for May is 68° with an average low of 36°. 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.
