S
M
T
W
T
F
S
30
81°
55°
31
77°
61°
1
73°
54°
2
77°
48°
3
77°
57°
4
86°
63°
5
73°
57°
6
75°
46°
7
81°
46°
8
90°
52°
9
70°
55°
10
64°
48°
11
69°
46°
12
75°
50°
13
77°
57°
14
72°
49°
15
77°
55°
16
70°
47°
17
70°
47°
18
70°
50°
19
72°
51°
20
74°
50°
21
71°
48°
22
71°
50°
23
66°
48°
24
70°
49°
25
71°
48°
26
63°
42°
27
61°
42°
28
67°
44°
29
69°
39°
30
59°
39°
1
58°
38°
2
59°
37°
3
60°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dettendorf
Dettendorf's September 2026 forecast shows daily high temperatures ranging from 58° to 77°, with overnight lows between 37° and 57°. The average high for September is 68° with an average low of 46°. 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 Dettendorf. See also: October | November | December.
