S
M
T
W
T
F
S
26
74°
56°
27
76°
57°
28
78°
57°
29
78°
58°
30
77°
59°
31
78°
58°
1
77°
57°
2
73°
53°
3
71°
51°
4
71°
51°
5
72°
56°
6
72°
56°
7
75°
57°
8
77°
57°
9
78°
56°
10
78°
57°
11
77°
57°
12
78°
56°
13
77°
58°
14
78°
56°
15
79°
57°
16
78°
57°
17
73°
58°
18
78°
58°
19
77°
57°
20
73°
50°
21
77°
48°
22
71°
48°
23
71°
49°
24
73°
51°
25
71°
48°
26
71°
51°
27
72°
49°
28
70°
48°
29
69°
47°
30
70°
46°
31
69°
46°
1
69°
47°
2
68°
48°
3
69°
48°
4
67°
49°
5
69°
48°
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 67° to 79°, with overnight lows between 46° and 59°. The average high for August is 74° with an average low of 53°. 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.