USA weather in August 2025

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

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The August weather guide for USA (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.

Top USA destinations

Below are average maximum temperatures at popular countries, regions and places in the USA 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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More about the USA

How hot is it in the USA in August?

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

How sunny is it in the USA in August?

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

Does it rain in the USA in August?

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

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

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

USA August sunrise & sunset times

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