S
M
T
W
T
F
S
26
77°
65°
27
82°
67°
28
78°
68°
29
80°
68°
30
82°
67°
31
81°
68°
1
81°
67°
2
78°
67°
3
77°
66°
4
78°
67°
5
79°
66°
6
78°
67°
7
78°
67°
8
77°
66°
9
77°
67°
10
78°
67°
11
77°
66°
12
76°
65°
13
76°
63°
14
76°
64°
15
75°
66°
16
76°
64°
17
76°
64°
18
77°
63°
19
76°
65°
20
77°
66°
21
82°
59°
22
82°
58°
23
78°
59°
24
77°
58°
25
76°
60°
26
77°
61°
27
81°
59°
28
75°
63°
29
75°
63°
30
82°
57°
31
77°
56°
1
75°
56°
2
75°
62°
3
76°
56°
4
78°
63°
5
78°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Charlestown
Charlestown's August 2026 forecast shows daily high temperatures ranging from 75° to 82°, with overnight lows between 56° and 68°. The average high for August is 78° with an average low of 64°. 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 Charlestown. See also: September | October | November.
