S
M
T
W
T
F
S
30
79°
59°
31
77°
59°
1
73°
54°
2
77°
48°
3
77°
52°
4
86°
59°
5
77°
54°
6
73°
45°
7
84°
50°
8
90°
59°
9
64°
50°
10
63°
47°
11
68°
45°
12
72°
49°
13
70°
53°
14
73°
50°
15
75°
56°
16
69°
48°
17
68°
51°
18
69°
49°
19
69°
49°
20
68°
50°
21
68°
51°
22
65°
50°
23
67°
49°
24
68°
54°
25
66°
52°
26
59°
46°
27
57°
49°
28
63°
49°
29
65°
44°
30
55°
44°
1
55°
43°
2
56°
42°
3
56°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Diedorf
Diedorf's September 2026 forecast shows daily high temperatures ranging from 55° to 75°, with overnight lows between 42° and 56°. The average high for September is 65° with an average low of 48°. 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 Diedorf. See also: October | November | December.