S
M
T
W
T
F
S
30
82°
63°
31
84°
65°
1
86°
67°
2
87°
67°
3
87°
66°
4
86°
67°
5
86°
67°
6
85°
66°
7
81°
66°
8
85°
65°
9
85°
62°
10
86°
61°
11
81°
65°
12
83°
64°
13
84°
65°
14
83°
63°
15
84°
65°
16
84°
64°
17
Hist. Avg.
79°
61°
18
Hist. Avg.
79°
61°
19
Hist. Avg.
78°
60°
20
Hist. Avg.
78°
60°
21
Hist. Avg.
78°
60°
22
Hist. Avg.
78°
59°
23
Hist. Avg.
77°
59°
24
Hist. Avg.
77°
58°
25
Hist. Avg.
76°
58°
26
Hist. Avg.
76°
58°
27
Hist. Avg.
76°
57°
28
Hist. Avg.
75°
57°
29
Hist. Avg.
75°
56°
30
Hist. Avg.
75°
56°
1
Hist. Avg.
74°
56°
2
Hist. Avg.
74°
55°
3
Hist. Avg.
74°
55°
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 81° to 87°, with overnight lows between 61° and 67°. The average high for September is 84° with an average low of 65°. 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.
