How can I protect a house foundation from weather conditions?
The concrete itself should be fine. Make sure water doesn't have anywhere it can pool, since standing water, concrete, and freezing temperatures can lead to cracking. I would protect any metal brackets or bolts intended to secure the framing to the foundation. And I would also protect any plumbing coming through the foundation. Where the water line is exposed, make sure it's drained, cap the end, and cover it in pipe insulation and then some plastic. Throw out some grass seed around the yard to minimize erosion.