S
M
T
W
T
F
S
30
77°
46°
31
69°
46°
1
69°
53°
2
74°
54°
3
68°
46°
4
67°
53°
5
67°
46°
6
70°
46°
7
69°
45°
8
68°
45°
9
67°
46°
10
67°
46°
11
66°
43°
12
66°
44°
13
65°
43°
14
68°
48°
15
70°
41°
16
63°
40°
17
61°
39°
18
61°
39°
19
62°
41°
20
62°
41°
21
63°
42°
22
63°
40°
23
65°
47°
24
68°
47°
25
68°
46°
26
67°
47°
27
68°
38°
28
64°
36°
29
58°
37°
30
58°
45°
1
60°
47°
2
63°
46°
3
65°
44°
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 58° to 77°, with overnight lows between 36° and 54°. The average high for September is 66° with an average low of 44°. 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.
