Detroit is a city of extremes. Winters can be brutal if you’re not used to lake-effect snow or cold temperatures and summers are invariably hot and humid. Spring and fall are the best times to visit. The trees and flowers are in bloom in April and May and everyone has a pep in their step. September and October are great months as well: Locals go hiking or head to the cider mill to enjoy a donut and a drink as they take in the fall foliage.