I live in Iowa and find that the humidity and heat in the summer puts me in a summerlong flare. All the moisture in the air also aggrevates my symptoms.
Years ago I used to live in Colorado and I go back for a visit at least once a year. I find the cool dry air gives me some relief from symptoms. Once in a while my husband and I talk about moving there, but I'm not sure I could handle the stress of a move. I'll be interested what others have to say about this topic.