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
64°
50°
8
N/A
9
70°
48°
10
66°
49°
11
72°
48°
12
77°
53°
13
69°
47°
14
64°
44°
15
61°
43°
16
67°
44°
17
66°
44°
18
66°
45°
19
65°
43°
20
66°
45°
21
66°
46°
22
67°
45°
23
63°
41°
24
62°
42°
25
64°
45°
26
60°
45°
27
62°
44°
28
62°
41°
29
67°
46°
30
66°
44°
31
64°
45°
1
63°
48°
2
67°
47°
3
69°
47°
4
71°
46°
5
70°
48°
6
71°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Black Diamond
Black Diamond's May 2026 forecast shows daily high temperatures ranging from 60° to 77°, with overnight lows between 41° and 53°. The average high for May is 66° 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.
