Other tips are to wear a hat, light-colored loose fitting clothing, and to drink plenty of water. Humidity in Death Valley is usually very low, often below 10%. 'People don't realize how much they're sweating,' Reynolds said. 'Bring at least one gallon of water per person per day –and drink it!' While most visitors come to see famous low elevation sites like Badwater (282 feet below sea level), some of the best areas of the park to visit in summer are at high elevations. Hikes to Wildrose Peak (elevation 9,064 feet) and Telescope Peak (elevation 11,049 feet) are best done in warmer months when they are not covered in snow. High overnight temperatures make sleeping at Furnace Creek Campground unbearable for most people in summer, but temperatures at Wildrose Campground (elevation 4,100 feet) and Mahogany Flat Campground (elevation 8,200 feet) are quite comfortable. Hottest Place on Earth Has Record-Breaking Hot June - Death Valley National Park (U.S. National Park Service)