San Diego proper and anywhere near the coast has great weather. Once you head inland it gets very hot in the summer. I live in Ramona, which is 35 miles N/NE from downtown San Diego. In the summer, San Diego is often a good 20 degrees cooler than Ramona.I was in Carlsbad for work last summer and my wife, who's from Oceanside, was bragging up the weather. It was pretty damn awesome. If I could magically make a bunch of people leave California and housing more affordable, I would move there in a heartbeat