S
M
T
W
T
F
S
30
90°
76°
31
92°
75°
1
90°
76°
2
92°
77°
3
91°
76°
4
90°
77°
5
92°
76°
6
93°
77°
7
91°
77°
8
92°
75°
9
91°
77°
10
92°
76°
11
90°
77°
12
85°
76°
13
86°
77°
14
88°
78°
15
88°
78°
16
88°
77°
17
87°
77°
18
87°
76°
19
88°
77°
20
89°
77°
21
88°
76°
22
87°
77°
23
86°
76°
24
86°
76°
25
87°
77°
26
88°
76°
27
87°
77°
28
86°
77°
29
86°
76°
30
86°
76°
1
86°
75°
2
87°
76°
3
86°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Naples
Naples's September 2026 forecast shows daily high temperatures ranging from 85° to 93°, with overnight lows between 75° and 78°. The average high for September is 89° 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 Naples. See also: October | November | December.
