S
M
T
W
T
F
S
30
78°
61°
31
74°
61°
1
73°
55°
2
76°
50°
3
74°
54°
4
N/A
5
68°
47°
6
70°
51°
7
74°
58°
8
75°
55°
9
61°
48°
10
60°
48°
11
60°
49°
12
59°
48°
13
58°
46°
14
61°
47°
15
59°
46°
16
58°
47°
17
63°
43°
18
68°
47°
19
70°
50°
20
68°
49°
21
61°
48°
22
64°
47°
23
66°
47°
24
67°
48°
25
68°
48°
26
68°
47°
27
66°
46°
28
62°
44°
29
60°
41°
30
64°
41°
1
63°
39°
2
54°
39°
3
55°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Altenthann
Altenthann's September 2026 forecast shows daily high temperatures ranging from 54° to 75°, with overnight lows between 39° and 58°. The average high for September is 64° with an average low of 47°. 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 Altenthann. See also: October | November | December.
