Weather in Wilmington in September
How warm is it in Wilmington in September?
In September the typical daytime high in Wilmington is 26.3 °C on average, from 28.5 °C at the start to 23.5 °C at the end of the month.
That is 3.3 °C cooler than in August and 5.8 °C warmer than in October.
The last 10 years were 1.1 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
The average of the weather stations Dover (67 km), Carlisle Wtp (150 km) and Newark Liberty Intl Ap (157 km); nearer ones count more.