August Weather in the United States

San Francisco Bridge at sunset in August
••• August is an ideal time to visit San Francisco, when the weather is mild. Getty

There are no official holidays in August, but that doesn't stop most Americans from taking a vacation. August is the busiest time at the beach and in the mountains, as summer-weary folks take a break to cool off. State and National Parks see many visitors during August as well. High temperatures in August for much of the country range in the 80s to 90s (Fahrenheit), and 100-degree temperatures are not uncommon in the southwest and southeast.

As for the nation's most popular destinations, Las Vegas is the hottest in August, with temperatures consistently reaching above 100°F, while San Francisco is the most temperate, with high temps only in the 70s.

Hurricane Season is from June 1st to November 30

June 1st signals the beginning of hurricane season, for both the Atlantic and Eastern Pacific. In general, there is more potential for hurricanes forming in the Atlantic Ocean to make landfall in the coastal states, from Florida to Maine, as well as along the Gulf Coast states, such as Texas and Louisiana. Bottom line, if you're planning a beach vacation, be aware of the potential for hurricanes during this time.

At a glance: Average August temperatures for the top 10 tourist destinations in the United States (High / Low):

  • New York City: 83°F / 69°F (28°C / 21°C)
  • Los Angeles: 84°F / 64°F (28°C / 17°C)
  • Chicago: 81°F / 63°F (27°C / 17°C)
  • Washington, DC: 87°F / 65°F (31°C / 19°C)
  • Las Vegas: 103°F / 74°F (39°C / 23°C)
  • San Francisco: 70°F / 56°F (21°C / 13°C)
  • Hawaii: 89°F / 74°F (32°C / 23°C)
  • Grand Canyon: 82°F / 53°F (28°C / 12°C)
  • Florida: 92°F / 73°F (33°C / 22.7°C)
  • New Orleans: 90°F / 75°F (32°C / 24°C)