S
M
T
W
T
F
S
26
85°
68°
27
86°
68°
28
90°
69°
29
84°
67°
30
80°
60°
31
84°
56°
1
79°
69°
2
79°
67°
3
79°
64°
4
78°
64°
5
80°
63°
6
81°
62°
7
84°
63°
8
85°
62°
9
84°
63°
10
84°
62°
11
85°
63°
12
85°
62°
13
82°
63°
14
83°
62°
15
80°
60°
16
79°
59°
17
85°
65°
18
86°
65°
19
86°
64°
20
87°
65°
21
85°
64°
22
85°
64°
23
84°
63°
24
86°
65°
25
86°
64°
26
85°
64°
27
84°
63°
28
84°
64°
29
83°
62°
30
84°
63°
31
85°
63°
1
84°
62°
2
84°
62°
3
83°
61°
4
79°
57°
5
79°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Black Mountain
Black Mountain's August 2026 forecast shows daily high temperatures ranging from 78° to 87°, with overnight lows between 56° and 69°. The average high for August is 83° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Black Mountain. See also: September | October | November.