S
M
T
W
T
F
S
26
78°
62°
27
78°
62°
28
76°
61°
29
80°
62°
30
77°
62°
31
76°
61°
1
75°
61°
2
76°
62°
3
77°
62°
4
74°
61°
5
77°
61°
6
76°
60°
7
76°
61°
8
75°
58°
9
74°
55°
10
73°
54°
11
73°
58°
12
74°
56°
13
73°
57°
14
73°
61°
15
74°
60°
16
77°
61°
17
75°
54°
18
72°
54°
19
74°
57°
20
75°
58°
21
75°
58°
22
73°
53°
23
79°
52°
24
73°
52°
25
74°
54°
26
73°
51°
27
72°
51°
28
73°
53°
29
77°
57°
30
77°
57°
31
78°
56°
1
78°
57°
2
79°
57°
3
77°
50°
4
76°
49°
5
69°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mount Desert
Mount Desert's August 2026 forecast shows daily high temperatures ranging from 69° to 80°, with overnight lows between 49° and 62°. The average high for August is 75° with an average low of 57°. 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 Mount Desert. See also: September | October | November.
