S
M
T
W
T
F
S
30
71°
42°
31
82°
37°
1
88°
45°
2
66°
46°
3
66°
45°
4
68°
49°
5
75°
49°
6
69°
54°
7
60°
47°
8
68°
41°
9
77°
38°
10
84°
41°
11
71°
49°
12
72°
49°
13
67°
47°
14
55°
44°
15
68°
42°
16
73°
46°
17
75°
50°
18
66°
48°
19
68°
44°
20
73°
43°
21
74°
46°
22
67°
43°
23
70°
45°
24
69°
43°
25
70°
44°
26
69°
47°
27
68°
45°
28
67°
39°
29
57°
32°
30
59°
35°
1
58°
32°
2
63°
33°
3
56°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Darby
Darby's September 2026 forecast shows daily high temperatures ranging from 56° to 75°, with overnight lows between 31° and 50°. The average high for September is 67° with an average low of 41°. 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 Darby. See also: October | November | December.