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
66°
48°
7
79°
59°
8
77°
59°
9
59°
50°
10
N/A
11
66°
52°
12
69°
54°
13
64°
57°
14
69°
57°
15
72°
52°
16
61°
48°
17
62°
51°
18
63°
50°
19
63°
52°
20
68°
51°
21
66°
50°
22
65°
49°
23
67°
51°
24
66°
52°
25
66°
49°
26
58°
47°
27
59°
52°
28
61°
45°
29
57°
44°
30
56°
45°
1
56°
46°
2
57°
44°
3
59°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Siegen
Siegen's September 2026 forecast shows daily high temperatures ranging from 56° to 72°, with overnight lows between 44° and 57°. 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 Siegen. See also: October | November | December.
