S
M
T
W
T
F
S
26
76°
57°
27
77°
58°
28
73°
58°
29
76°
57°
30
77°
58°
31
76°
58°
1
72°
57°
2
72°
57°
3
70°
56°
4
72°
56°
5
73°
57°
6
72°
56°
7
72°
56°
8
73°
57°
9
71°
57°
10
70°
56°
11
71°
56°
12
70°
55°
13
71°
52°
14
71°
55°
15
72°
56°
16
70°
54°
17
70°
54°
18
71°
53°
19
70°
53°
20
71°
55°
21
74°
49°
22
74°
48°
23
71°
47°
24
70°
51°
25
71°
54°
26
73°
49°
27
72°
48°
28
70°
55°
29
69°
54°
30
78°
47°
31
69°
46°
1
69°
47°
2
72°
53°
3
69°
47°
4
68°
54°
5
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Charlemont
Charlemont's August 2026 forecast shows daily high temperatures ranging from 68° to 78°, with overnight lows between 46° and 58°. The average high for August is 72° with an average low of 54°. 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 Charlemont. See also: September | October | November.