S
M
T
W
T
F
S
30
90°
74°
31
90°
75°
1
89°
76°
2
90°
75°
3
89°
75°
4
87°
74°
5
89°
75°
6
88°
75°
7
86°
72°
8
89°
73°
9
88°
72°
10
89°
71°
11
88°
73°
12
90°
72°
13
90°
73°
14
89°
72°
15
85°
72°
16
86°
71°
17
89°
72°
18
84°
71°
19
84°
71°
20
85°
70°
21
87°
71°
22
85°
71°
23
86°
70°
24
85°
70°
25
83°
69°
26
83°
70°
27
84°
69°
28
83°
69°
29
82°
68°
30
83°
67°
1
82°
68°
2
81°
67°
3
81°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Perdido Key
Perdido Key's September 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 67° and 76°. The average high for September is 86° with an average low of 71°. 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 Perdido Key. See also: October | November | December.
