Weatheo

Wilmington Weather by Month

Average temperatures, rainfall and humidity for Wilmington, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Wilmington month looks like before you travel — then check the live Wilmington forecast for the days ahead.

Warmest month

July

31°C average high

Coolest month

January

4°C average low

Wettest month

September

120 mm of rain

Driest month

January

49 mm of rain

Average temperature and rainfall in Wilmington by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January14°C4°C-11°C / 26°C
49 mm
72%12 km/h
February16°C6°C-10°C / 28°C
60 mm
73%13 km/h
March19°C9°C-5°C / 31°C
56 mm
69%14 km/h
April23°C13°C0°C / 31°C
56 mm
69%13 km/h
May27°C18°C5°C / 36°C
79 mm
74%12 km/h
June30°C22°C12°C / 36°C
74 mm
77%11 km/h
July31°C24°C17°C / 37°C
73 mm
79%11 km/h
August30°C23°C12°C / 37°C
114 mm
81%10 km/h
September28°C20°C10°C / 36°C
120 mm
80%11 km/h
October24°C15°C3°C / 33°C
68 mm
78%11 km/h
November19°C9°C-3°C / 28°C
56 mm
77%11 km/h
December16°C6°C-8°C / 26°C
60 mm
78%11 km/h

Best time to visit Wilmington

The most comfortable time to visit Wilmington is generally April to May and October, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around September, totalling about 867 mm a year.

Travellers who prefer heat should aim for July, when highs average 31°C. September is the month to avoid if rain would spoil your plans — it averages 120 mm, roughly 2× the rainfall of the driest month (January).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Wilmington forecast for what is happening now.

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