S
M
T
W
T
F
S
30
87°
69°
31
87°
69°
1
86°
67°
2
87°
63°
3
83°
62°
4
82°
63°
5
81°
62°
6
82°
61°
7
81°
61°
8
81°
62°
9
82°
63°
10
82°
61°
11
84°
62°
12
84°
62°
13
83°
63°
14
83°
63°
15
84°
62°
16
82°
64°
17
83°
62°
18
82°
63°
19
81°
62°
20
80°
63°
21
75°
62°
22
80°
63°
23
81°
64°
24
Hist. Avg.
78°
60°
25
Hist. Avg.
78°
60°
26
Hist. Avg.
77°
60°
27
Hist. Avg.
77°
60°
28
Hist. Avg.
77°
60°
29
Hist. Avg.
76°
59°
30
Hist. Avg.
76°
59°
1
Hist. Avg.
76°
59°
2
Hist. Avg.
76°
59°
3
Hist. Avg.
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Naples
Naples's September 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 61° and 69°. The average high for September is 83° with an average low of 63°. 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.
