S
M
T
W
T
F
S
30
86°
66°
31
88°
67°
1
89°
66°
2
90°
67°
3
90°
69°
4
91°
68°
5
89°
69°
6
90°
69°
7
89°
68°
8
87°
68°
9
83°
67°
10
86°
68°
11
88°
67°
12
88°
67°
13
89°
66°
14
88°
67°
15
88°
67°
16
87°
65°
17
87°
59°
18
81°
61°
19
85°
58°
20
82°
57°
21
79°
57°
22
78°
58°
23
79°
61°
24
85°
60°
25
85°
62°
26
84°
61°
27
85°
62°
28
84°
60°
29
83°
59°
30
83°
59°
1
82°
58°
2
82°
58°
3
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Deans Island
Deans Island's September 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 53° and 69°. The average high for September is 85° with an average low of 63°. 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 Deans Island. See also: October | November | December.
