I keep all of mine in my closet in a meguiars trunk organizer. I also have a plastic bin that I keep all of my towels in which is also in my closet. I never leave anything outside.
I keep all of my products in a dedicated kitchen cabinet. I'm a bachelor without a wife prowling about in the kitchen so I can get away with it. :grinno:
My garage temp ranges from 35-->85. I used to haul all my stuff in during the winter. That was before I put a thermometer our there. I realized it never really gets below 32 out there. I keep any eye on it. Due to space, I have hauled my oil stash down the basement. I use my car care products too often. It would be a pain have them anywhere except the garage.