S
M
T
W
T
F
S
30
89°
67°
31
85°
68°
1
87°
71°
2
89°
68°
3
84°
67°
4
85°
68°
5
84°
68°
6
88°
71°
7
88°
71°
8
87°
70°
9
87°
71°
10
86°
71°
11
88°
70°
12
87°
70°
13
87°
69°
14
86°
69°
15
84°
68°
16
86°
68°
17
85°
64°
18
82°
67°
19
83°
67°
20
84°
68°
21
86°
67°
22
81°
66°
23
84°
66°
24
83°
67°
25
83°
64°
26
85°
62°
27
Hist. Avg.
80°
60°
28
Hist. Avg.
79°
60°
29
Hist. Avg.
79°
59°
30
Hist. Avg.
79°
59°
1
Hist. Avg.
79°
58°
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
*Temporarily Unavailable
September Weather in Wilmington
Wilmington's September 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 62° and 71°. The average high for September is 85° with an average low of 68°. 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.
