S
M
T
W
T
F
S
30
81°
55°
31
77°
61°
1
73°
54°
2
77°
48°
3
77°
57°
4
86°
63°
5
72°
49°
6
76°
52°
7
82°
57°
8
84°
56°
9
60°
50°
10
64°
48°
11
64°
51°
12
60°
49°
13
61°
47°
14
62°
48°
15
65°
49°
16
65°
51°
17
66°
49°
18
69°
52°
19
60°
49°
20
62°
50°
21
65°
50°
22
65°
47°
23
67°
50°
24
68°
48°
25
68°
52°
26
67°
50°
27
63°
46°
28
65°
45°
29
63°
43°
30
64°
49°
1
58°
44°
2
60°
43°
3
63°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Starnberg
Starnberg's September 2026 forecast shows daily high temperatures ranging from 58° to 84°, with overnight lows between 43° and 57°. The average high for September is 66° 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 Starnberg. See also: October | November | December.