S
M
T
W
T
F
S
30
84°
64°
31
88°
59°
1
86°
63°
2
83°
64°
3
90°
69°
4
90°
68°
5
88°
68°
6
86°
59°
7
80°
60°
8
79°
60°
9
77°
58°
10
79°
58°
11
74°
51°
12
74°
54°
13
76°
52°
14
73°
50°
15
78°
55°
16
75°
52°
17
75°
56°
18
74°
55°
19
74°
52°
20
75°
54°
21
77°
55°
22
77°
55°
23
76°
54°
24
77°
55°
25
76°
54°
26
75°
54°
27
76°
53°
28
76°
53°
29
75°
52°
30
75°
54°
1
74°
54°
2
74°
52°
3
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Otsego
Otsego's September 2026 forecast shows daily high temperatures ranging from 73° to 90°, with overnight lows between 50° and 69°. The average high for September is 78° with an average low of 56°. 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 Otsego. See also: October | November | December.
