Wilmington Weather in September

September in Wilmington averages 21°C (70°F) during the day and 7°C (45°F) at night. Quite a bit of rainfall is typical this month, with around 113 mm (4.4 in) on average. An umbrella is a good idea.

Rainfall in Wilmington in September

Records from the past 30 years suggest around 11 days of rain, with 113 mm (4.4 in) average for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Wilmington in September

In September, Wilmington gets pleasant temperatures, with highs of 21°C (70°F). Nights cool to around 7°C (45°F). Conditions are often most pleasant around the middle of the day. At 7°C (45°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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• January
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For a detailed overview over the year and the best time to visit the United States of America, check out our Wilmington's climate page.

Wilmington Temperature in September

Min Temperature 7°C (45°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 37%  

Precipitation 113 mm (4.4 in)  

Rainy days 11 days  

What to Wear in Wilmington in September

For Wilmington in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.

What To Do in Wilmington in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

3/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Wilmington's climate page.

More climate data for Wilmington

Temperature Rainfall

See the full Wilmington climate overview or explore weather in the United States of America.