S
M
T
W
T
F
S
30
87°
73°
31
89°
73°
1
92°
74°
2
95°
75°
3
92°
76°
4
96°
76°
5
95°
70°
6
86°
70°
7
84°
69°
8
85°
71°
9
86°
70°
10
89°
72°
11
88°
72°
12
86°
70°
13
87°
69°
14
85°
67°
15
86°
71°
16
86°
71°
17
83°
70°
18
83°
69°
19
80°
67°
20
80°
69°
21
81°
68°
22
81°
69°
23
83°
68°
24
83°
69°
25
82°
69°
26
78°
67°
27
80°
68°
28
81°
68°
29
77°
67°
30
78°
66°
1
77°
66°
2
78°
65°
3
81°
65°
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 77° to 96°, with overnight lows between 65° and 76°. The average high for September is 84° with an average low of 69°. 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.
