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