I came to Los Angeles yesterday for a few days on a course. The two things that I immediately noticed were the cigarette smoke and how cold it was.
I often get the impression that California is this clean living society with smoking laws to prevent you ever breathing second hand smoke but that couldn't be further from the truth. I think the laws have created new pockets of smokers around doors which makes it worse than it used to be for non-smokers.
Living in the desert means that you enjoy an 8 to 10 month summer. The downside is that you forget that the rest of the country has seasons and don't take that in to account when you travel. I'm finding it decidedly cold here and forgot to bring anything with long sleeves. A quick bit of research shows that Phoenix has a high which is 30F above LA's today and tomorrow.