S
M
T
W
T
F
S
30
58°
44°
31
59°
44°
1
58°
43°
2
56°
42°
3
57°
44°
4
58°
43°
5
57°
42°
6
61°
45°
7
60°
46°
8
55°
44°
9
59°
46°
10
60°
44°
11
60°
42°
12
59°
36°
13
58°
42°
14
58°
41°
15
57°
40°
16
55°
39°
17
55°
37°
18
56°
37°
19
54°
36°
20
53°
39°
21
51°
40°
22
50°
35°
23
51°
39°
24
50°
40°
25
50°
39°
26
51°
36°
27
50°
34°
28
Hist. Avg.
51°
34°
29
Hist. Avg.
51°
34°
30
Hist. Avg.
50°
33°
1
Hist. Avg.
50°
33°
2
Hist. Avg.
50°
33°
3
Hist. Avg.
49°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Naptowne
Naptowne's September 2026 forecast shows daily high temperatures ranging from 50° to 61°, with overnight lows between 34° and 46°. The average high for September is 56° with an average low of 41°. 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 Naptowne. See also: October | November | December.