S
M
T
W
T
F
S
26
65°
38°
27
72°
31°
28
70°
40°
29
68°
46°
30
55°
46°
1
59°
43°
2
48°
32°
3
48°
36°
4
61°
48°
5
72°
56°
6
63°
52°
7
53°
37°
8
47°
34°
9
49°
38°
10
52°
39°
11
55°
41°
12
54°
40°
13
55°
39°
14
59°
41°
15
58°
39°
16
66°
45°
17
65°
46°
18
67°
46°
19
66°
45°
20
64°
46°
21
65°
45°
22
65°
46°
23
60°
39°
24
57°
40°
25
59°
40°
26
60°
46°
27
61°
40°
28
60°
41°
29
60°
42°
30
61°
41°
31
62°
49°
1
63°
44°
2
64°
42°
3
63°
49°
4
67°
49°
5
64°
46°
6
66°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Charlemont
Charlemont's May 2026 forecast shows daily high temperatures ranging from 47° to 72°, with overnight lows between 32° and 56°. The average high for May is 60° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Charlemont. See also: June | July | August.