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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.

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).

Washington Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Washington - and find the best time to visit.

Best Places in the United States of America in August

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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

Washington 3-Day Forecast

Popular in August

Where to go in August - average daytime high across popular destinations.

Bucket list

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