S
M
T
W
T
F
S
30
72°
61°
31
70°
61°
1
72°
52°
2
73°
52°
3
73°
61°
4
73°
61°
5
66°
49°
6
69°
56°
7
81°
60°
8
66°
54°
9
63°
50°
10
64°
51°
11
64°
54°
12
63°
50°
13
64°
51°
14
64°
51°
15
65°
53°
16
67°
53°
17
66°
51°
18
63°
47°
19
63°
53°
20
64°
52°
21
64°
54°
22
66°
54°
23
67°
53°
24
67°
54°
25
66°
50°
26
63°
47°
27
61°
46°
28
60°
45°
29
62°
46°
30
58°
52°
1
61°
48°
2
59°
46°
3
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ostercappeln
Ostercappeln's September 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 45° and 60°. The average high for September is 64° with an average low of 51°. 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 Ostercappeln. See also: October | November | December.