S
M
T
W
T
F
S
30
69°
49°
31
74°
56°
1
74°
57°
2
75°
55°
3
69°
50°
4
67°
47°
5
67°
46°
6
66°
46°
7
68°
54°
8
72°
47°
9
65°
45°
10
65°
45°
11
66°
41°
12
63°
44°
13
63°
45°
14
62°
44°
15
63°
44°
16
64°
43°
17
63°
43°
18
65°
42°
19
62°
41°
20
62°
40°
21
61°
40°
22
62°
41°
23
64°
45°
24
67°
40°
25
69°
45°
26
69°
47°
27
61°
44°
28
60°
40°
29
64°
39°
30
63°
37°
1
58°
43°
2
65°
47°
3
65°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oneonta
Oneonta's September 2026 forecast shows daily high temperatures ranging from 58° to 75°, with overnight lows between 36° and 57°. The average high for September is 65° with an average low of 45°. 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 Oneonta. See also: October | November | December.
