Delaware weather in August 2025

Expect 30°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Delaware in August. Check more long-term weather averages for Delaware in August before you book your next holiday to Delaware in 2025/2026.

  • 30°C maximum daytime temperature in August in Delaware (Dover)30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in August in Delaware (Dover)10
    10 days with some rainfall
  • 18°C minimum night-time temperature in August in Delaware (Dover)18
    18°C min night temperature
  • 14 hours of daylight per day in August in Delaware (Dover)14
    14 hours of daylight per day
  • Moderate heat & humidity in August in Delaware (Dover)M
    Moderate heat & humidity
  • 110 mm monthly rainfall in August in Delaware (Dover)110
    110 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Delaware (Dover)8
    8 (Very High) UV index

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The August weather guide for Delaware (Dover) 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.

Top Delaware destinations

Below are average maximum temperatures at popular countries, regions and places in Delaware in August. Select a holiday destination to see more weather parameters.

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

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How hot is it in Delaware in August?

Daytime temperatures usually reach 30°C in Dover, Delaware in August with moderate heat and humidity, falling to 18°C at night.

How sunny is it in Delaware in August?

There are normally 8 hours of bright sunshine each day in Dover, Delaware in August - that's 62% of daylight hours.

Does it rain in Delaware in August?

There are usually 10 days with some rain in Dover, Delaware in August and the average monthly rainfall is 110mm.

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

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

Delaware August sunrise & sunset times

Browse the sunrise and sunset times for Delaware in August 2025. Select a month to view Delaware sunrise and sunset times for the next 12 months. The Delaware sunrise and sunset times shown below are for Dover.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:03 19:13
Saturday, 16th August 2025 05:16 18:56
Sunday, 31st August 2025 05:30 18:34

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