S
M
T
W
T
F
S
30
90°
72°
31
89°
68°
1
88°
68°
2
84°
69°
3
85°
69°
4
88°
71°
5
87°
70°
6
88°
72°
7
89°
71°
8
88°
69°
9
88°
70°
10
83°
71°
11
87°
70°
12
88°
66°
13
82°
69°
14
82°
69°
15
85°
68°
16
86°
68°
17
85°
64°
18
82°
63°
19
81°
63°
20
81°
67°
21
82°
64°
22
83°
63°
23
83°
63°
24
84°
66°
25
85°
67°
26
84°
64°
27
84°
61°
28
82°
63°
29
81°
60°
30
83°
62°
1
82°
62°
2
Hist. Avg.
78°
58°
3
Hist. Avg.
78°
58°
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 81° to 90°, with overnight lows between 60° and 72°. The average high for September is 85° with an average low of 67°. 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.
