S
M
T
W
T
F
S
30
83°
55°
31
79°
56°
1
70°
59°
2
75°
59°
3
77°
61°
4
84°
60°
5
73°
56°
6
71°
50°
7
80°
47°
8
79°
52°
9
80°
52°
10
85°
68°
11
76°
49°
12
74°
62°
13
77°
63°
14
76°
47°
15
71°
55°
16
82°
59°
17
76°
58°
18
74°
53°
19
72°
52°
20
72°
49°
21
73°
52°
22
70°
51°
23
72°
50°
24
71°
54°
25
65°
46°
26
65°
48°
27
66°
53°
28
68°
53°
29
64°
50°
30
64°
51°
1
65°
53°
2
67°
51°
3
69°
52°
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 64° to 82°, with overnight lows between 46° and 63°. The average high for September is 71° with an average low of 53°. 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.
