Wilmington weather in August 2025

Expect 29°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Wilmington in August. Check more long-term weather averages for Wilmington in August before you book your next holiday to Delaware in 2025/2026.

  • 29°C maximum daytime temperature in August in Wilmington29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in August in Wilmington9
    9 days with some rainfall
  • 18°C minimum night-time temperature in August in Wilmington18
    18°C min night temperature
  • 14 hours of daylight per day in August in Wilmington14
    14 hours of daylight per day
  • Moderate heat & humidity in August in WilmingtonM
    Moderate heat & humidity
  • 98 mm monthly rainfall in August in Wilmington98
    98 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Wilmington8
    8 (Very High) UV index
  • 23°C sea temperature in August in Wilmington23
    23°C sea temperature

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The August weather guide for Delaware (Wilmington) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Wilmington in August?

Daytime temperatures usually reach 29°C in Wilmington in August with moderate heat and humidity, falling to 18°C at night.

How sunny is it in Wilmington in August?

There are normally 8 hours of bright sunshine each day in Wilmington in August - that's 61% of daylight hours.

How warm is the sea around Wilmington in August?

The average sea temperature around Wilmington in August is 23°C.

Does it rain in Wilmington in August?

There are usually 9 days with some rain in Wilmington in August and the average monthly rainfall is 98mm.

What is the chance of a hurricane in Wilmington in August?

On average less than 1 day in August in Wilmington is likely to be affected by the passage of one or more tropical storms.

Wilmington August sunrise & sunset times

Browse the sunrise and sunset times for Wilmington in August 2025. Select a month to view Wilmington sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:01 19:15
Saturday, 16th August 2025 05:15 18:57
Sunday, 31st August 2025 05:30 18:34

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