Washington DC Weather in August

August in Washington DC brings very high temperatures, with daytime highs of 31°C (88°F) and nights around 21°C (70°F). Quite a bit of rainfall is expected, around 76 mm (3 in), so pack an umbrella.

Rainfall in Washington DC in August

Analyzing past climate data, one can expect approximately 10 days of rain, averaging 76 mm (3 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Washington DC in August

August in Washington DC brings very high temperatures, with highs of 31°C (88°F) and nights around 21°C (70°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights remain mild at 21°C (70°F), making evenings a pleasant time to be outdoors.

Sunshine in Washington DC in August

With approximately 262 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Washington DC in August

In August, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

If you prefer dry days with pleasant temperatures, April and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Washington DC's climate page.

Washington DC Temperature in August

Min Temperature 21°C (70°F)  

Max Temperature 31°C (88°F)  

Chance of Rain 34%  

Precipitation 76 mm (3 in)  

Rainy days 10 days  

Humidity 69%  

Windspeed 4 m/s (8 knots)  

Sunshine 262 hours  

Percentage Sunshine 62%  

What to Wear in Washington DC in August

Warm but pleasant conditions in Washington DC in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Washington DC in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Washington DC's climate page.

More climate data for Washington DC

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Washington DC climate overview or explore weather in the United States of America.