S
M
T
W
T
F
S
30
89°
74°
31
90°
73°
1
91°
75°
2
88°
79°
3
88°
78°
4
86°
79°
5
86°
78°
6
87°
78°
7
85°
78°
8
84°
78°
9
87°
76°
10
86°
78°
11
89°
77°
12
87°
79°
13
88°
77°
14
86°
74°
15
84°
75°
16
82°
77°
17
82°
77°
18
82°
77°
19
82°
76°
20
83°
77°
21
83°
77°
22
84°
76°
23
86°
77°
24
82°
77°
25
81°
76°
26
80°
76°
27
81°
74°
28
80°
69°
29
78°
70°
30
80°
69°
1
79°
72°
2
80°
70°
3
79°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dauphin Island
Dauphin Island's September 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 67° and 79°. The average high for September is 84° with an average low of 76°. 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 Dauphin Island. See also: October | November | December.
