S
M
T
W
T
F
S
30
68°
54°
31
72°
58°
1
73°
57°
2
67°
53°
3
66°
51°
4
70°
52°
5
70°
53°
6
71°
55°
7
72°
56°
8
73°
57°
9
73°
57°
10
72°
56°
11
71°
57°
12
70°
56°
13
66°
52°
14
67°
50°
15
67°
50°
16
68°
47°
17
64°
47°
18
65°
48°
19
67°
47°
20
68°
47°
21
67°
46°
22
64°
49°
23
60°
49°
24
61°
48°
25
60°
46°
26
59°
49°
27
61°
51°
28
61°
46°
29
60°
47°
30
60°
45°
1
59°
50°
2
65°
51°
3
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Altenmünster
Altenmünster's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 45° and 58°. The average high for September is 66° with an average low of 51°. 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 Altenmünster. See also: October | November | December.
