I usually go to america in the summer and leave my horse alone for 4 weeks. She's albe to have vacation too!
Anyway she's outside most of the day, but that's it.
When I get back I jump right on her. I've always done that. Even the first year I started her, and she is very very hot. But I think it hardly makes a diffrence...
But if you feel more confortable, then do what you planed. It won't hurt, but I don't belive it's necesary.