S
M
T
W
T
F
S
30
66°
54°
31
75°
53°
1
72°
55°
2
75°
51°
3
77°
55°
4
71°
50°
5
67°
50°
6
67°
42°
7
72°
37°
8
65°
44°
9
68°
45°
10
71°
52°
11
64°
36°
12
76°
31°
13
76°
60°
14
61°
34°
15
62°
31°
16
73°
53°
17
72°
47°
18
64°
35°
19
60°
34°
20
53°
39°
21
54°
33°
22
57°
31°
23
62°
36°
24
63°
40°
25
63°
43°
26
64°
44°
27
63°
44°
28
66°
46°
29
68°
46°
30
68°
48°
1
64°
46°
2
66°
38°
3
58°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wilmington
Wilmington's September 2026 forecast shows daily high temperatures ranging from 53° to 68°, with overnight lows between 31° and 48°. The average high for September is 62° 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 Wilmington. See also: October | November | December.
