S
M
T
W
T
F
S
30
75°
54°
31
74°
53°
1
75°
56°
2
75°
60°
3
76°
62°
4
82°
63°
5
83°
61°
6
83°
54°
7
81°
53°
8
74°
54°
9
74°
52°
10
73°
55°
11
73°
58°
12
72°
53°
13
74°
55°
14
77°
57°
15
77°
56°
16
71°
57°
17
72°
56°
18
75°
55°
19
76°
49°
20
74°
51°
21
73°
49°
22
75°
47°
23
68°
47°
24
68°
48°
25
69°
48°
26
67°
46°
27
67°
46°
28
66°
47°
29
65°
44°
30
66°
44°
1
65°
49°
2
71°
44°
3
70°
48°
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 65° to 83°, with overnight lows between 44° and 63°. The average high for September is 73° with an average low of 52°. 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.
