Washington Weather in August

August in Washington brings very high temperatures, with daytime highs of 31°C (88°F) and nights around 19°C (66°F). Quite a bit of rainfall is expected, around 92 mm (3.6 in), so pack an umbrella.

Rainfall in Washington in August

You can expect rain on around 8 days based on historical patterns, with 92 mm (3.6 in) average for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Washington in August

August in Washington brings very high temperatures, with highs of 31°C (88°F) and nights around 19°C (66°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. Nights cool down to 19°C (66°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Washington in August

Expect sunny days throughout the month, with an estimated 268 hours of sunshine. This makes it a pleasant time to visit Washington.

If you prefer dry days with pleasant temperatures, October typically offers 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.

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's climate page.

Washington Temperature in August

Min Temperature 19°C (66°F)  

Max Temperature 31°C (88°F)  

Chance of Rain 27%  

Precipitation 92 mm (3.6 in)  

Rainy days 8 days  

Humidity 70% *  

Sunshine 268 hours *  

Percentage Sunshine 64% *  

* Data from: St. Louis, the United States of America (71 KM, 44 Miles).

What to Wear in Washington in August

Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Washington 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's climate page.

More climate data for Washington

Temperature Rainfall Sunshine Humidity

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