Click on a day for an hourly weather forecast
The weather in Wilmington in September is very hot. The average temperatures are between 23°C and 28°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Wilmington during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Wilmington in September 2025.
If you’re planning to visit Wilmington in the near future, we highly recommend that you review the 14 day weather forecast for Wilmington before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 12° / 7° | 5 | 26 | 1 | 56 mm | Ok | Wilmington in January |
| February | 14° / 8° | 4 | 24 | 0 | 61 mm | Good | Wilmington in February |
| March | 17° / 11° | 4 | 27 | 0 | 67 mm | Good | Wilmington in March |
| April | 21° / 15° | 4 | 26 | 0 | 61 mm | Good | Wilmington in April |
| May | 25° / 20° | 4 | 27 | 0 | 90 mm | Perfect | Wilmington in May |
| June | 29° / 24° | 6 | 24 | 0 | 101 mm | Good | Wilmington in June |
| July | 30° / 25° | 7 | 24 | 0 | 123 mm | Ok | Wilmington in July |
| August | 30° / 25° | 9 | 22 | 0 | 165 mm | Ok | Wilmington in August |
| September | 28° / 23° | 6 | 24 | 0 | 148 mm | Perfect | Wilmington in September |
| October | 23° / 18° | 3 | 28 | 0 | 68 mm | Perfect | Wilmington in October |
| November | 18° / 12° | 3 | 27 | 0 | 61 mm | Good | Wilmington in November |
| December | 15° / 10° | 5 | 26 | 0 | 62 mm | Good | Wilmington in December |