S
M
T
W
T
F
S
30
76°
54°
31
75°
53°
1
76°
55°
2
77°
52°
3
75°
46°
4
67°
44°
5
67°
52°
6
68°
53°
7
74°
53°
8
74°
51°
9
75°
52°
10
69°
47°
11
73°
49°
12
73°
52°
13
72°
53°
14
72°
51°
15
71°
48°
16
69°
42°
17
65°
49°
18
67°
44°
19
65°
42°
20
66°
40°
21
61°
39°
22
60°
46°
23
61°
43°
24
60°
39°
25
59°
38°
26
59°
39°
27
60°
46°
28
66°
39°
29
64°
37°
30
58°
38°
1
59°
39°
2
59°
35°
3
57°
37°
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 57° to 77°, with overnight lows between 35° and 55°. The average high for September is 67° 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 Wilmington. See also: October | November | December.
