S
M
T
W
T
F
S
30
78°
63°
31
75°
61°
1
75°
56°
2
76°
52°
3
76°
55°
4
86°
64°
5
75°
57°
6
74°
48°
7
86°
59°
8
89°
62°
9
67°
47°
10
70°
43°
11
70°
47°
12
72°
46°
13
74°
51°
14
72°
51°
15
74°
53°
16
71°
49°
17
68°
48°
18
68°
47°
19
69°
48°
20
66°
49°
21
67°
52°
22
66°
51°
23
68°
51°
24
69°
50°
25
69°
51°
26
68°
46°
27
63°
44°
28
63°
43°
29
64°
42°
30
64°
50°
1
61°
45°
2
59°
44°
3
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Langenfeld
Langenfeld's September 2026 forecast shows daily high temperatures ranging from 59° to 89°, with overnight lows between 42° and 62°. The average high for September is 69° 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 Langenfeld. See also: October | November | December.