S
M
T
W
T
F
S
30
88°
69°
31
91°
72°
1
96°
71°
2
95°
70°
3
95°
73°
4
95°
73°
5
91°
72°
6
82°
68°
7
82°
64°
8
91°
64°
9
77°
68°
10
81°
61°
11
81°
57°
12
79°
61°
13
72°
55°
14
77°
55°
15
86°
63°
16
73°
63°
17
86°
68°
18
79°
66°
19
82°
68°
20
72°
61°
21
63°
59°
22
68°
52°
23
70°
50°
24
72°
54°
25
66°
61°
26
66°
55°
27
68°
55°
28
77°
52°
29
82°
48°
30
68°
61°
1
70°
55°
2
68°
46°
3
72°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Pleasant
Mount Pleasant's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Mount Pleasant. See also: October | November | December.
