S
M
T
W
T
F
S
30
71°
52°
31
68°
55°
1
69°
53°
2
68°
53°
3
68°
51°
4
70°
51°
5
68°
48°
6
67°
48°
7
66°
49°
8
66°
49°
9
67°
50°
10
69°
52°
11
72°
53°
12
72°
52°
13
71°
47°
14
65°
48°
15
64°
53°
16
65°
49°
17
63°
55°
18
69°
50°
19
70°
52°
20
69°
56°
21
70°
55°
22
69°
54°
23
68°
54°
24
63°
53°
25
63°
53°
26
66°
52°
27
60°
46°
28
58°
44°
29
59°
47°
30
63°
50°
1
64°
51°
2
64°
51°
3
57°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Klettgau
Klettgau's September 2026 forecast shows daily high temperatures ranging from 57° to 72°, with overnight lows between 44° and 56°. 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 Klettgau. See also: October | November | December.
