S
M
T
W
T
F
S
30
88°
75°
31
88°
76°
1
89°
76°
2
88°
75°
3
88°
75°
4
89°
74°
5
87°
75°
6
88°
75°
7
89°
73°
8
90°
74°
9
91°
73°
10
87°
74°
11
87°
73°
12
86°
74°
13
88°
73°
14
87°
74°
15
88°
73°
16
89°
74°
17
89°
74°
18
88°
71°
19
89°
71°
20
85°
74°
21
88°
72°
22
88°
74°
23
89°
74°
24
88°
73°
25
88°
74°
26
87°
74°
27
88°
73°
28
88°
73°
29
87°
72°
30
87°
72°
1
86°
73°
2
87°
68°
3
84°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fleming Island
Fleming Island's September 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 67° and 76°. The average high for September is 88° with an average low of 73°. 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 Fleming Island. See also: October | November | December.
