I leave my recurve in my car a lot, summer and winter. Only problem I've ever had was when I grabbed the bow out of the car, strung it, tried to shoot it all in about a minute. Your chances are very good that if you leave the bow in the car, laying flat, unstrung, and preferably in a sleeve, it will be OK when you take it out. Do not string it right away. Let it cool, I don't know, maybe 15 minutes in the shade, and then string it and shoot it and you'll probably be OK. Under no circumstances leave it strung in the car and unstrung I'd still want it to be fully supported. I really like Otto's response. A friend and I were looking at his longbow in the parking lot at work when a security guard came along and about blew a gasket. We told him we had no string and no arrows. It was therefore just a stick and he could take a flyer. He chose not to push the issue. All in all, I think your bow will be OK if you do what I suggested. I still keep bows in the car and haven't had a problem since I always let them cool before stringing them. Good luck.