S
M
T
W
T
F
S
26
89°
68°
27
90°
70°
28
89°
70°
29
89°
69°
30
90°
70°
31
91°
70°
1
90°
69°
2
85°
68°
3
84°
65°
4
82°
67°
5
82°
65°
6
83°
64°
7
84°
67°
8
86°
68°
9
87°
69°
10
89°
69°
11
88°
68°
12
85°
68°
13
88°
69°
14
89°
68°
15
85°
69°
16
84°
68°
17
86°
67°
18
89°
69°
19
88°
68°
20
88°
62°
21
87°
60°
22
82°
60°
23
82°
61°
24
83°
61°
25
83°
60°
26
82°
65°
27
84°
61°
28
82°
60°
29
81°
60°
30
81°
59°
31
79°
58°
1
79°
59°
2
80°
60°
3
78°
63°
4
79°
59°
5
81°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mount Pleasant
Mount Pleasant's August 2026 forecast shows daily high temperatures ranging from 78° to 91°, with overnight lows between 58° and 70°. The average high for August is 85° with an average low of 65°. 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 Pleasant. See also: September | October | November.
