10 Cool Destinations to Visit If You Need to Escape the Heat

Average Summer temperatures: 61 to 68 degrees Fahrenheit

Get a taste of hygge at Denmark's colorful capital, where it's laid-back and bike-friendly. Copenhagen is both charming and chic aesthetically, but there's also plenty to do, from canal cruises to walking tours. There are enough cathedrals, landmarks, and gardens to keep you occupied your whole trip.