S
M
T
W
T
F
S
30
90°
77°
31
90°
82°
1
90°
80°
2
90°
83°
3
91°
83°
4
91°
80°
5
90°
78°
6
91°
82°
7
89°
82°
8
91°
80°
9
90°
82°
10
89°
81°
11
90°
84°
12
94°
78°
13
89°
78°
14
90°
79°
15
90°
80°
16
90°
80°
17
88°
78°
18
87°
79°
19
86°
79°
20
87°
76°
21
88°
79°
22
86°
79°
23
88°
79°
24
88°
80°
25
87°
81°
26
87°
79°
27
87°
79°
28
87°
78°
29
87°
72°
30
84°
75°
1
84°
74°
2
86°
76°
3
87°
82°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cudjoe Key
Cudjoe Key's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Cudjoe Key. See also: October | November | December.
