This rainy city in the Pacific Northwest may be famous for its coffee (hello, Starbucks!) but it should also get recognition for its high number of residents with healthy skin. Because sunshine isn't ample—it only peeks out of the clouds 47 percent of the time—there are few instances of over exposure to the sun and sunburn, says Fusco. It also helps that the city has low pollution levels. Still, it's important to wear sunscreen since you can get a burn even on overcast days. Go with one that's at least SPF 15 before heading outdoors.