S
M
T
W
T
F
S
30
102°
71°
31
101°
74°
1
100°
71°
2
98°
73°
3
96°
74°
4
99°
71°
5
101°
74°
6
102°
72°
7
102°
73°
8
103°
74°
9
100°
73°
10
99°
73°
11
98°
73°
12
102°
74°
13
102°
73°
14
101°
73°
15
101°
74°
16
101°
73°
17
101°
73°
18
100°
69°
19
98°
65°
20
99°
67°
21
97°
72°
22
101°
69°
23
95°
72°
24
92°
67°
25
91°
59°
26
92°
61°
27
97°
64°
28
N/A
29
97°
67°
30
96°
71°
1
93°
71°
2
80°
69°
3
75°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
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.
