S
M
T
W
T
F
S
30
81°
66°
31
84°
55°
1
80°
52°
2
82°
57°
3
84°
63°
4
86°
55°
5
84°
68°
6
82°
68°
7
77°
64°
8
81°
59°
9
73°
52°
10
84°
48°
11
77°
52°
12
66°
48°
13
66°
43°
14
66°
50°
15
68°
45°
16
66°
41°
17
70°
45°
18
64°
55°
19
66°
57°
20
68°
48°
21
64°
46°
22
66°
43°
23
63°
50°
24
68°
57°
25
65°
60°
26
66°
50°
27
70°
55°
28
60°
50°
29
63°
51°
30
68°
47°
1
64°
45°
2
62°
46°
3
54°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cooperstown
Cooperstown's September 2026 forecast shows daily high temperatures ranging from 54° to 70°, with overnight lows between 42° and 60°. The average high for September is 64° with an average low of 50°. 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 Cooperstown. See also: October | November | December.
