I'm moving to southern Arizona in October. My current summer wardrobe is pretty minimal (I only own one pair of sandals, for example) and my plan for Fall shopping just got thrown out the window. Work will be well-air conditioned, but obviously I will need to change plans. The monthly highs and lows for the area are HERE. I've never lived in a climate like this (although I've spent a little time there). Work is very casual-- jeans and secure sandals are A-OK-- probably no shorts, but otherwise put-together.

What do I need and WHEN do I need to shop for it? Should I be shopping summer clearance now? Wait to get to AZ? Shop early Fall to save for November?

My current warm and transitional wardrobe will be in finds, below.