S
M
T
W
T
F
S
29
73°
50°
30
74°
51°
1
73°
53°
2
77°
51°
3
78°
44°
4
77°
44°
5
70°
45°
6
68°
51°
7
73°
52°
8
73°
51°
9
69°
43°
10
76°
49°
11
Hist. Avg.
74°
50°
12
Hist. Avg.
73°
49°
13
Hist. Avg.
73°
49°
14
Hist. Avg.
73°
49°
15
Hist. Avg.
73°
49°
16
Hist. Avg.
73°
49°
17
Hist. Avg.
73°
49°
18
Hist. Avg.
73°
49°
19
Hist. Avg.
73°
49°
20
Hist. Avg.
72°
48°
21
Hist. Avg.
72°
48°
22
Hist. Avg.
72°
48°
23
Hist. Avg.
72°
48°
24
Hist. Avg.
72°
48°
25
Hist. Avg.
72°
48°
26
Hist. Avg.
72°
48°
27
Hist. Avg.
72°
48°
28
Hist. Avg.
72°
48°
29
Hist. Avg.
72°
48°
30
Hist. Avg.
72°
48°
31
Hist. Avg.
71°
48°
1
Hist. Avg.
72°
48°
2
Hist. Avg.
72°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Black Diamond
Black Diamond's December 2026 forecast shows daily high temperatures ranging from 68° to 78°, with overnight lows between 43° and 53°. The average high for December is 73° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Black Diamond. See also: January | February | March.
