S
M
T
W
T
F
S
26
81°
60°
27
83°
61°
28
82°
60°
29
83°
61°
30
84°
62°
31
84°
62°
1
85°
61°
2
81°
57°
3
78°
54°
4
78°
55°
5
79°
59°
6
78°
60°
7
82°
60°
8
82°
59°
9
84°
61°
10
84°
60°
11
83°
60°
12
84°
59°
13
83°
60°
14
84°
58°
15
85°
59°
16
84°
60°
17
79°
59°
18
84°
60°
19
83°
59°
20
80°
54°
21
83°
50°
22
77°
51°
23
77°
50°
24
78°
53°
25
77°
50°
26
77°
52°
27
76°
50°
28
76°
49°
29
75°
48°
30
75°
48°
31
76°
47°
1
74°
47°
2
73°
49°
3
74°
50°
4
72°
51°
5
74°
49°
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 72° to 85°, with overnight lows between 47° and 62°. The average high for August is 80° with an average low of 56°. 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.
