I would like to put my Xbox in the garage so that we can play there together on the screen, but I'm afraid that if it gets too cold at night it will be damaged.
The garage is not heated and it can get really cold in it in winter or spring.
Well, when moisture comes in, things look worse. If necessary, dismantle them and put them in the dry living room. Or is it too much effort to build up and take down? If necessary, you can stow them in a box.
Unfortunately, I can't put it in the living room because there's smoking in the garage and I don't want the room to smell like it and dismantling it is difficult because it hangs on the ceiling next to the projector
Well, nothing will happen. My parents's old stereo is also outside under the pavilion. As I said, as long as there's no moisture, everything is safe.
In a pinch, grab a ladder and dismantle it. Or clip it somewhere else and run a longer cable.