S
M
T
W
T
F
S
30
75°
65°
31
70°
60°
1
74°
57°
2
74°
56°
3
76°
58°
4
82°
66°
5
74°
58°
6
78°
50°
7
88°
63°
8
82°
64°
9
67°
55°
10
69°
47°
11
71°
50°
12
75°
56°
13
73°
62°
14
74°
62°
15
84°
59°
16
70°
56°
17
69°
49°
18
68°
55°
19
73°
52°
20
69°
54°
21
68°
49°
22
69°
48°
23
73°
47°
24
68°
51°
25
74°
46°
26
82°
50°
27
83°
55°
28
82°
55°
29
84°
55°
30
84°
61°
1
72°
55°
2
71°
50°
3
70°
51°
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 70° to 84°, with overnight lows between 46° and 61°. The average high for September is 78° with an average low of 53°. 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.
