I was surprised to see how much moisture comes out of the concrete floor in my garage. It did a number on my steering wheel and even some tools. I ended up putting a dehumidifier out there and it worked wonders, even during winter months. If it gets down to 45 in your storage area , many dehumidifiers stop working. You can tape a plastic sheet to floor as a test. If there’s much moisture coming out, you will see it under the plastic in a few days. Floor paint can help too if that’s an option. I think moisture is more damaging over time than the cold temps alone.

I have no experience with these, just passing along as another thought.
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