S
M
T
W
T
F
S
26
81°
54°
27
82°
62°
28
75°
61°
29
66°
53°
30
64°
45°
1
62°
44°
2
58°
40°
3
68°
37°
4
81°
54°
5
65°
49°
6
58°
45°
7
64°
45°
8
72°
45°
9
78°
54°
10
73°
57°
11
74°
50°
12
78°
51°
13
77°
56°
14
71°
46°
15
78°
51°
16
79°
68°
17
85°
67°
18
89°
65°
19
86°
65°
20
68°
60°
21
65°
58°
22
65°
60°
23
76°
62°
24
77°
64°
25
77°
63°
26
80°
66°
27
83°
66°
28
84°
65°
29
76°
62°
30
81°
60°
31
81°
58°
1
79°
58°
2
83°
60°
3
81°
61°
4
82°
62°
5
82°
62°
6
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Diamond
Diamond's May 2026 forecast shows daily high temperatures ranging from 76° to 84°, with overnight lows between 58° and 66°. The average high for May is 81° with an average low of 62°. 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. See also: June | July | August.