Sub-freezing air is great for drawing out moisture.
I hate buying wood. I haven't in many years. When I was just out of the navy and/or L.A. for the first time, and moved to the north coast, I didn't know squat. Everyone said their wood was dry and seasoned, but rarely it was. I think about all I've learned since I was that ignorant 21 year old. Just getting my own wood was so much work and trouble, selling it never seemed worth it. I didn't want to cut all my own trees, so I'd get a permit to go out and cut behind the loggers.
Now, in my old age, and having a tractor, I get my, and my neighbors' wood every year. I do my neighbors as a free service, as we're all old now. I take time to remove the moss so it dries faster and better and is cleaner. If I were doing it for money, I could never do it as well. Now we also cut our own trees (alder). With the amount of woodlot we have, we could never cut them as fast as they grow, so we have a system with a positive carbon collection.