D.C. weather in August 2025

Expect daytime maximum temperatures of 30°C in D.C., USA in August and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 103 mm of rainfall in the month.

  • 30°C maximum daytime temperature in August in D.C. (Washington)30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in August in D.C. (Washington)9
    9 days with some rainfall
  • 20°C minimum night-time temperature in August in D.C. (Washington)20
    20°C min night temperature
  • 14 hours of daylight per day in August in D.C. (Washington)14
    14 hours of daylight per day
  • High heat & humidity in August in D.C. (Washington)H
    High heat & humidity
  • 103 mm monthly rainfall in August in D.C. (Washington)103
    103 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in D.C. (Washington)8
    8 (Very High) UV index

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The August weather guide for D.C., represented by Washington, (Washington) 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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More about the USA

How hot is it in D.C. in August?

Daytime temperatures usually reach 30°C in Washington, D.C. in August with high heat and humidity, falling to 20°C at night.

How sunny is it in D.C. in August?

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

Does it rain in D.C. in August?

There are usually 9 days with some rain in Washington, D.C. in August and the average monthly rainfall is 103mm.

What is the chance of a hurricane in D.C. in August?

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

D.C. August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:09 19:19
Saturday, 16th August 2025 05:23 19:01
Sunday, 31st August 2025 05:36 18:39

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