S
M
T
W
T
F
S
26
68°
40°
27
60°
49°
28
59°
48°
29
66°
48°
30
74°
47°
1
71°
50°
2
74°
52°
3
80°
52°
4
81°
53°
5
66°
55°
6
59°
53°
7
65°
47°
8
64°
47°
9
70°
51°
10
68°
47°
11
72°
48°
12
77°
47°
13
69°
47°
14
74°
46°
15
69°
45°
16
67°
45°
17
69°
45°
18
67°
44°
19
68°
46°
20
66°
45°
21
61°
46°
22
62°
41°
23
65°
42°
24
70°
46°
25
70°
46°
26
62°
41°
27
62°
41°
28
67°
49°
29
63°
51°
30
66°
47°
31
71°
48°
1
73°
51°
2
73°
49°
3
64°
44°
4
71°
46°
5
72°
44°
6
63°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Black Diamond
Black Diamond's May 2026 forecast shows daily high temperatures ranging from 61° to 77°, with overnight lows between 41° and 51°. The average high for May is 68° with an average low of 46°. 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 Black Diamond. See also: June | July | August.
