S
M
T
W
T
F
S
30
76°
57°
31
72°
52°
1
75°
53°
2
69°
54°
3
71°
56°
4
70°
51°
5
68°
50°
6
68°
50°
7
67°
49°
8
70°
49°
9
73°
50°
10
66°
49°
11
72°
54°
12
73°
49°
13
69°
54°
14
66°
52°
15
66°
50°
16
67°
46°
17
65°
47°
18
65°
46°
19
66°
45°
20
64°
46°
21
64°
52°
22
65°
53°
23
65°
48°
24
64°
46°
25
63°
45°
26
64°
43°
27
62°
47°
28
62°
43°
29
63°
43°
30
63°
44°
1
66°
48°
2
66°
46°
3
62°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mertesdorf
Mertesdorf's September 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 43° and 57°. The average high for September is 67° 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 Mertesdorf. See also: October | November | December.
