S
M
T
W
T
F
S
30
83°
40°
31
71°
45°
1
74°
44°
2
73°
42°
3
73°
41°
4
80°
44°
5
77°
40°
6
74°
39°
7
73°
38°
8
72°
38°
9
69°
39°
10
69°
38°
11
70°
43°
12
72°
45°
13
78°
46°
14
77°
44°
15
78°
46°
16
78°
42°
17
74°
36°
18
67°
35°
19
66°
34°
20
72°
38°
21
74°
36°
22
71°
37°
23
71°
43°
24
70°
41°
25
64°
36°
26
63°
41°
27
62°
36°
28
60°
31°
29
59°
36°
30
61°
42°
1
62°
44°
2
62°
32°
3
63°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Davenport
Davenport's September 2026 forecast shows daily high temperatures ranging from 59° to 83°, with overnight lows between 29° and 46°. The average high for September is 70° with an average low of 39°. 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 Davenport. See also: October | November | December.
