S
M
T
W
T
F
S
26
59°
50°
27
67°
46°
28
68°
42°
29
71°
46°
30
72°
55°
1
67°
43°
2
62°
47°
3
64°
45°
4
78°
46°
5
84°
60°
6
75°
64°
7
70°
48°
8
71°
46°
9
78°
54°
10
86°
55°
11
64°
44°
12
74°
60°
13
79°
52°
14
71°
52°
15
75°
44°
16
87°
52°
17
91°
65°
18
95°
71°
19
98°
70°
20
97°
71°
21
89°
63°
22
64°
58°
23
64°
57°
24
74°
61°
25
83°
67°
26
82°
70°
27
87°
69°
28
84°
56°
29
80°
63°
30
79°
55°
31
72°
55°
1
76°
58°
2
73°
57°
3
78°
58°
4
80°
62°
5
77°
60°
6
79°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mount Pleasant
Mount Pleasant's May 2026 forecast shows daily high temperatures ranging from 72° to 87°, with overnight lows between 55° and 69°. The average high for May is 79° with an average low of 60°. 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 Mount Pleasant. See also: June | July | August.
