Live in California, near Disneyland, it's very nice weather around here. I only recently bought a bike and begun to commute by it, so I've yet to see how different the weather will feel while riding. I hate the cold, so sometime I prefer staying in doors, but most of the time the weather is good enough for riding.
The drivers here don't really like bikes on the road with them from what I've seen, but are attentive and not to aggressive; although I'v learned drivers all follow their own set of rules most of the time. Depending on where you ride the roads might be real smooth or a complete mess.