If you live where winter weather means cold weather, don't leave your expensive wood bats in the garage all winter. Cold air is typically dry air. Maple wood bats are ideally around 10-15% moisture content. Less than 10% starts to make them brittle (relatively). Additionally, extreme swings in moisture content aren't good for wood fibers. Where I live, the garage is the perfect place for that. Damp and humid during August, and bitter cold and dry in February and March.
If you live where winter weather means cold weather, don't leave your expensive wood bats in the garage all winter. Cold air is typically dry air. Maple wood bats are ideally around 10-15% moisture content. Less than 10% starts to make them brittle (relatively). Additionally, extreme swings in moisture content aren't good for wood fibers. Where I live, the garage is the perfect place for that. Damp and humid during August, and bitter cold and dry in February and March.