S
M
T
W
T
F
S
30
70°
57°
31
70°
57°
1
74°
50°
2
69°
49°
3
69°
54°
4
70°
49°
5
68°
48°
6
69°
49°
7
67°
49°
8
69°
52°
9
72°
56°
10
73°
50°
11
66°
47°
12
65°
47°
13
65°
51°
14
66°
52°
15
70°
54°
16
71°
50°
17
64°
55°
18
71°
55°
19
72°
54°
20
72°
52°
21
63°
50°
22
62°
45°
23
63°
46°
24
63°
50°
25
64°
53°
26
67°
52°
27
67°
50°
28
66°
51°
29
67°
45°
30
61°
42°
1
59°
41°
2
59°
40°
3
58°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bad Mergentheim
Bad Mergentheim's September 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 40° and 57°. The average high for September is 67° 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 Bad Mergentheim. See also: October | November | December.
