S
M
T
W
T
F
S
26
79°
63°
27
80°
62°
28
78°
63°
29
79°
60°
30
79°
62°
31
85°
62°
1
84°
61°
2
84°
61°
3
83°
62°
4
81°
62°
5
81°
61°
6
83°
61°
7
83°
62°
8
79°
59°
9
78°
56°
10
78°
60°
11
81°
60°
12
78°
58°
13
79°
61°
14
82°
61°
15
83°
62°
16
83°
61°
17
82°
61°
18
83°
60°
19
82°
62°
20
83°
61°
21
83°
61°
22
82°
60°
23
81°
61°
24
79°
60°
25
80°
60°
26
80°
59°
27
81°
59°
28
79°
54°
29
83°
58°
30
82°
56°
31
80°
55°
1
81°
57°
2
82°
56°
3
81°
56°
4
81°
57°
5
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mountain Lake
Mountain Lake's August 2026 forecast shows daily high temperatures ranging from 77° to 85°, with overnight lows between 54° and 63°. The average high for August is 81° with an average low of 60°. 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 Mountain Lake. See also: September | October | November.