there should be no problems. I leave mine out in a 30X22' pen in the day year around. If I left my 2 monsters alone in the house, I shutter to think of what they might think of.

On the other hand when I come home, they get to come in, and be with me until the next morning. My little male lays on the register to cool down fast.

Another thing you can do for the outdoors is to buy a kiddy swiming pool, and fill it up with water. They will take a dip during the day. My female literally jumps in and twirls around splashing away.