✔ 最佳答案
Unless you have many of them in a big cage, guinea pigs are really better off indoors.
It gives them the chance to be around you, learning your smells and souns, and that make for faster bonding and socializing. Yes, they can get too cold or too hot, but usually if it is comfortable for you, it is comfortable for them. Where temperatures get below 60* F, they should have plenty of bedding in their hide to dig in and protected from drafts and wet.
I would work on getting them indoors if at all possible.