S
M
T
W
T
F
S
30
75°
61°
31
72°
57°
1
73°
52°
2
75°
54°
3
77°
54°
4
84°
61°
5
75°
55°
6
77°
54°
7
86°
61°
8
84°
59°
9
68°
46°
10
70°
47°
11
71°
50°
12
75°
52°
13
72°
55°
14
73°
52°
15
78°
54°
16
72°
52°
17
68°
50°
18
73°
52°
19
73°
53°
20
74°
54°
21
72°
53°
22
69°
52°
23
70°
51°
24
69°
52°
25
70°
49°
26
62°
47°
27
61°
52°
28
63°
47°
29
64°
44°
30
58°
44°
1
58°
43°
2
59°
43°
3
61°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Altenkessel
Altenkessel's September 2026 forecast shows daily high temperatures ranging from 58° to 78°, with overnight lows between 43° and 55°. The average high for September is 68° 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 Altenkessel. See also: October | November | December.