S
M
T
W
T
F
S
26
62°
52°
27
62°
51°
28
63°
54°
29
65°
54°
30
63°
52°
31
64°
51°
1
63°
51°
2
62°
50°
3
62°
54°
4
65°
53°
5
63°
53°
6
63°
51°
7
62°
52°
8
63°
53°
9
63°
53°
10
64°
54°
11
67°
54°
12
67°
53°
13
66°
53°
14
62°
52°
15
62°
53°
16
67°
52°
17
64°
48°
18
63°
47°
19
63°
48°
20
64°
48°
21
63°
47°
22
63°
48°
23
64°
49°
24
63°
47°
25
64°
49°
26
64°
52°
27
62°
52°
28
66°
49°
29
62°
51°
30
63°
49°
31
62°
51°
1
64°
52°
2
65°
51°
3
65°
46°
4
64°
46°
5
65°
51°
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 62° to 67°, with overnight lows between 46° and 54°. The average high for August is 64° with an average low of 51°. 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.
