S
M
T
W
T
F
S
30
80°
62°
31
82°
60°
1
82°
54°
2
77°
53°
3
80°
57°
4
81°
58°
5
81°
58°
6
78°
54°
7
76°
55°
8
78°
50°
9
73°
48°
10
71°
58°
11
75°
55°
12
78°
56°
13
79°
57°
14
77°
56°
15
77°
57°
16
71°
48°
17
70°
48°
18
71°
47°
19
Hist. Avg.
71°
48°
20
Hist. Avg.
70°
48°
21
Hist. Avg.
70°
47°
22
Hist. Avg.
69°
47°
23
Hist. Avg.
69°
46°
24
Hist. Avg.
68°
46°
25
Hist. Avg.
68°
46°
26
Hist. Avg.
68°
45°
27
Hist. Avg.
67°
45°
28
Hist. Avg.
67°
44°
29
Hist. Avg.
66°
44°
30
Hist. Avg.
66°
44°
1
Hist. Avg.
65°
43°
2
Hist. Avg.
65°
43°
3
Hist. Avg.
64°
43°
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 70° to 82°, with overnight lows between 47° and 62°. The average high for September is 77° with an average low of 55°. 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.
