Wilmington Weather in September

What's the weather like in Wilmington (North Carolina) in September 2025?

The climate in Wilmington during September can be summarized as hot, humid and wet.

September is in the fall / autumn in Wilmington and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 30°C (85°F), whilst at night 18°C (65°F) is normal.

Wilmington weather averages (imperial / metric)
Daytime temperature 29.5°C 85.1°F
Nightly temperature 18.3°C 64.9°F
Average temperature 23.9°C 75°F
Daily sunshine 8.2 hrs
Avg rainfall 139 mm 5.5 ins
Rainy days 9 days
Sea temperature 26.9°C 80.3°F
Humidity 80%
Windspeed 13.7kph 9 mph

On average September is the 4th wettest month of the year in Wilmington with around 139mm 5.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.2 hours of sunshine per day.

September temperatures in Wilmington

Wilmington average temperature in September

September rainfall

Wilmington average rain in September

September hourly sunshine

Wilmington average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Wilmington in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Wilmington weather stats

Wilmington weather statistics
Hottest month: July 31.6°C 88.9°F
Driest month: October 71mm 2.8ins
Sunniest month: April 9.8hrs
Coldest month: January 13°C 55.4°F
Wettest month: July 203mm 8ins
Map showing location of Wilmington (34.22573, -77.94471) Wilmington map pin © Google

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