We were in AZ last winter and it was around 80 the entire time we were there. When we were outside, in the sun, it was a very comfortable temp, but out of the sun, it was very cool (this coming from MN where it was about -20 when we left home). We were in Las Vegas a few years ago in June and it was 105 the day we were walking around the strip. It was warm, but not so bad that you couldn't be outside. We have been to FL several times and are most recent trip in Jan it was 83 the first day we were there and humid. That was the first thing I noticed stepping out of the airport. We walked on the beach for a bit that day and got very warm and sweaty. If it had been that humid and 105, you couldn't have been outside. Even in MN in the summers, the humidity is what gets to you. Some days could be 90 and low humidity and you are fine, but others could be 80 and high humidity and you look like you just stepped out of the shower. AZ is dry, VERY dry. My skin was terribly dry when we were there. Drink a lot of water and use a lot of moisturizer.