S
M
T
W
T
F
S
26
68°
54°
27
72°
53°
28
77°
55°
29
82°
59°
30
84°
62°
1
85°
64°
2
86°
62°
3
91°
63°
4
78°
62°
5
76°
56°
6
85°
62°
7
92°
66°
8
100°
73°
9
99°
74°
10
100°
74°
11
104°
74°
12
104°
76°
13
95°
76°
14
95°
73°
15
100°
75°
16
93°
75°
17
91°
62°
18
76°
58°
19
81°
61°
20
87°
61°
21
93°
66°
22
95°
73°
23
95°
75°
24
94°
73°
25
88°
65°
26
84°
52°
27
72°
52°
28
69°
56°
29
79°
61°
30
85°
64°
31
91°
65°
1
95°
67°
2
96°
68°
3
92°
66°
4
90°
67°
5
90°
65°
6
88°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Blue Diamond
Blue Diamond's May 2026 forecast shows daily high temperatures ranging from 69° to 96°, with overnight lows between 52° and 68°. The average high for May is 86° 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 Blue Diamond. See also: June | July | August.