S
M
T
W
T
F
S
30
55°
48°
31
58°
43°
1
55°
44°
2
54°
45°
3
61°
55°
4
58°
48°
5
58°
47°
6
57°
48°
7
57°
48°
8
57°
44°
9
58°
47°
10
56°
46°
11
54°
45°
12
54°
42°
13
57°
44°
14
54°
41°
15
55°
42°
16
51°
37°
17
50°
42°
18
53°
42°
19
51°
38°
20
51°
36°
21
52°
39°
22
49°
36°
23
46°
35°
24
49°
43°
25
48°
42°
26
47°
42°
27
51°
41°
28
51°
41°
29
50°
39°
30
47°
39°
1
50°
40°
2
45°
37°
3
46°
38°
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 45° to 61°, with overnight lows between 35° and 55°. The average high for September is 52° with an average low of 42°. 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.