RATED #1 BEST LARGE CITY FOR SUCCESSFUL AGING. The Bay, the Bridge, those red cable cars and fresh breezes. If you can afford it, San Francisco is an urbane Mecca for food, technology and atmosphere. Sure, the fog rolls in now and then, but you can still count on 249 sunny days a year. For retiring to a city with all the amenities and weather a Boomer could want, you'd be hard-pressed to find a better location.