S
M
T
W
T
F
S
26
66°
39°
27
70°
41°
28
59°
45°
29
68°
43°
30
72°
48°
1
63°
46°
2
63°
43°
3
61°
50°
4
64°
52°
5
61°
48°
6
59°
48°
7
63°
46°
8
66°
48°
9
68°
46°
10
59°
39°
11
55°
34°
12
61°
36°
13
57°
45°
14
54°
39°
15
59°
37°
16
57°
39°
17
59°
43°
18
55°
46°
19
61°
52°
20
63°
52°
21
70°
55°
22
66°
55°
23
70°
55°
24
75°
58°
25
75°
60°
26
74°
56°
27
70°
54°
28
67°
54°
29
68°
53°
30
68°
53°
31
67°
55°
1
68°
55°
2
67°
54°
3
60°
52°
4
61°
50°
5
61°
50°
6
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Charlestown
Charlestown's May 2026 forecast shows daily high temperatures ranging from 60° to 75°, with overnight lows between 49° and 60°. The average high for May is 68° 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 May weather will actually feel in Charlestown. See also: June | July | August.
