S
M
T
W
T
F
S
30
59°
35°
31
59°
39°
1
60°
32°
2
62°
36°
3
64°
48°
4
60°
51°
5
63°
45°
6
60°
48°
7
60°
47°
8
58°
44°
9
57°
42°
10
56°
40°
11
56°
41°
12
57°
43°
13
52°
42°
14
56°
40°
15
52°
43°
16
54°
40°
17
50°
41°
18
51°
43°
19
52°
42°
20
49°
41°
21
50°
39°
22
51°
39°
23
50°
41°
24
48°
37°
25
47°
33°
26
47°
33°
27
46°
34°
28
45°
35°
29
46°
31°
30
44°
32°
1
44°
39°
2
47°
39°
3
49°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Naptowne
Naptowne's September 2026 forecast shows daily high temperatures ranging from 44° to 64°, with overnight lows between 31° and 51°. The average high for September is 53° with an average low of 40°. 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.