S
M
T
W
T
F
S
30
59°
35°
31
59°
39°
1
60°
30°
2
64°
35°
3
65°
50°
4
62°
51°
5
65°
43°
6
60°
48°
7
62°
50°
8
62°
48°
9
57°
42°
10
59°
41°
11
56°
43°
12
57°
43°
13
54°
45°
14
56°
43°
15
47°
38°
16
54°
40°
17
50°
41°
18
50°
43°
19
50°
42°
20
52°
41°
21
50°
38°
22
49°
34°
23
49°
33°
24
50°
37°
25
48°
40°
26
47°
40°
27
50°
39°
28
51°
38°
29
50°
36°
30
47°
38°
1
48°
39°
2
51°
38°
3
50°
37°
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 47° to 65°, with overnight lows between 33° and 51°. The average high for September is 54° 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.