S
M
T
W
T
F
S
30
68°
59°
31
64°
54°
1
64°
54°
2
63°
55°
3
66°
55°
4
73°
54°
5
63°
52°
6
68°
56°
7
82°
60°
8
72°
53°
9
64°
48°
10
62°
48°
11
63°
51°
12
65°
52°
13
66°
53°
14
67°
52°
15
69°
53°
16
62°
50°
17
61°
48°
18
60°
50°
19
60°
50°
20
62°
52°
21
61°
52°
22
62°
53°
23
63°
52°
24
64°
52°
25
64°
49°
26
61°
44°
27
59°
44°
28
58°
43°
29
59°
44°
30
58°
50°
1
59°
46°
2
56°
45°
3
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Schmallenberg
Schmallenberg's September 2026 forecast shows daily high temperatures ranging from 56° to 82°, with overnight lows between 43° and 60°. The average high for September is 63° 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 Schmallenberg. See also: October | November | December.