S
M
T
W
T
F
S
30
55°
49°
31
55°
47°
1
56°
43°
2
54°
45°
3
54°
43°
4
55°
43°
5
54°
42°
6
53°
42°
7
51°
41°
8
52°
42°
9
52°
41°
10
53°
41°
11
52°
42°
12
52°
40°
13
50°
40°
14
51°
40°
15
52°
41°
16
50°
40°
17
49°
38°
18
47°
39°
19
48°
38°
20
49°
37°
21
48°
41°
22
51°
37°
23
49°
40°
24
48°
37°
25
48°
38°
26
47°
32°
27
50°
40°
28
48°
40°
29
48°
39°
30
47°
39°
1
49°
38°
2
49°
38°
3
48°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nelsonville
Nelsonville's September 2026 forecast shows daily high temperatures ranging from 47° to 56°, with overnight lows between 32° and 49°. The average high for September is 51° 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 Nelsonville. See also: October | November | December.