S
M
T
W
T
F
S
30
76°
53°
31
75°
51°
1
76°
57°
2
75°
55°
3
69°
51°
4
70°
53°
5
67°
52°
6
67°
49°
7
68°
49°
8
73°
53°
9
73°
53°
10
74°
52°
11
73°
54°
12
70°
50°
13
70°
51°
14
65°
48°
15
65°
48°
16
66°
50°
17
66°
53°
18
67°
52°
19
70°
48°
20
68°
45°
21
63°
44°
22
63°
43°
23
62°
44°
24
62°
44°
25
64°
47°
26
63°
44°
27
62°
43°
28
62°
50°
29
61°
52°
30
66°
45°
1
67°
43°
2
60°
43°
3
60°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gelnhausen
Gelnhausen's September 2026 forecast shows daily high temperatures ranging from 60° to 76°, with overnight lows between 42° and 57°. The average high for September is 67° with an average low of 49°. 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 Gelnhausen. See also: October | November | December.