S
M
T
W
T
F
S
26
68°
34°
27
75°
33°
28
72°
37°
29
69°
36°
30
53°
46°
1
60°
39°
2
55°
36°
3
53°
34°
4
72°
37°
5
83°
43°
6
62°
45°
7
59°
36°
8
58°
31°
9
50°
30°
10
67°
47°
11
59°
38°
12
61°
33°
13
49°
38°
14
55°
48°
15
63°
47°
16
79°
45°
17
85°
57°
18
85°
60°
19
91°
69°
20
83°
47°
21
65°
36°
22
68°
46°
23
59°
49°
24
58°
49°
25
72°
52°
26
70°
51°
27
71°
53°
28
73°
53°
29
74°
54°
30
74°
53°
31
75°
49°
1
70°
50°
2
66°
51°
3
67°
50°
4
66°
54°
5
68°
54°
6
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Charlestown
South Charlestown's May 2026 forecast shows daily high temperatures ranging from 58° to 91°, with overnight lows between 36° and 69°. The average high for May is 71° with an average low of 52°. 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 South Charlestown. See also: June | July | August.
