It depends mostly on the type of material it is made of. Some of the syntheitc bodies it makes very little difference
Tempertures and humidity levels effect all guitars, acoustic or electric. Try to maintain ambient temps and humidity levels.
You keeping your acoustic outside or something? Most people don't let their house drop to a low temperature unless of course you're poor.
Yup. Cold air tends to be dry air too. Dry air is even worse.
Yes but not as much as transient humidity.