Hi Sam,
We live in Newfoundland, Canada. Living on the coast ensures moist air at all times and it is rarely, if ever, hot. We do have central air and humidity control in our home, though, which also helps.
We spent some time in Toronto this year and while Casey seemed fairly OK, the 30+ Celsius temps made her turn bright red if out to long and I thought she seemed drier than usual.
Our climate, though not warm enough for me :), seems perfect for her!
Take care
Mom to Casey born Feb 17/08(?LI/CIE), Sara born Feb 18/06, and Kaitlyn born July 2/03
Casey has been tested positive for a genetic mutation in the ICHTHYIN gene (which is indicative of either LI or CIE)