S
M
T
W
T
F
S
30
85°
60°
31
85°
70°
1
93°
71°
2
79°
72°
3
87°
71°
4
89°
73°
5
84°
64°
6
84°
60°
7
84°
60°
8
86°
56°
9
88°
66°
10
88°
72°
11
84°
63°
12
81°
60°
13
83°
68°
14
78°
52°
15
76°
57°
16
81°
64°
17
84°
65°
18
79°
65°
19
72°
63°
20
68°
58°
21
69°
56°
22
66°
58°
23
67°
57°
24
68°
56°
25
69°
56°
26
71°
55°
27
74°
59°
28
74°
58°
29
74°
57°
30
68°
55°
1
67°
57°
2
68°
57°
3
72°
53°
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 66° to 84°, with overnight lows between 52° and 68°. The average high for September is 73° with an average low of 58°. 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.
