S
M
T
W
T
F
S
30
75°
57°
31
72°
63°
1
71°
64°
2
72°
64°
3
81°
63°
4
77°
59°
5
74°
57°
6
73°
52°
7
76°
47°
8
77°
50°
9
72°
62°
10
76°
61°
11
71°
49°
12
78°
46°
13
81°
63°
14
66°
48°
15
69°
43°
16
77°
57°
17
71°
63°
18
73°
53°
19
64°
44°
20
60°
52°
21
63°
46°
22
63°
40°
23
63°
38°
24
63°
40°
25
68°
44°
26
66°
47°
27
63°
48°
28
64°
48°
29
66°
47°
30
67°
50°
1
68°
46°
2
65°
41°
3
58°
46°
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 68°, with overnight lows between 38° and 50°. 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.
