San Diego's Convention and Visitors Bureau likes to brag about its climate. But this is more than PR — the weather in San Diego is worth boasting about. Summertime highs rarely top 80 degrees, while winter highs generally fall somewhere between 65 and 70. Overall, San Diego has about 300 sunny days per year. California’s other cities also enjoy mild weather, but none of its peers can quite match San Diego's cocktail of 70s and sunshine day in and day out. With its action-packed Gaslamp Quarter, miles of beaches and surfable waves, and natural landscapes inland and on the shore, San Diego arguably has the most attractions of any city on our list.