I see a lot of talk about the teams up north playing home games having an advantage in the CFP first round due to the weather. I think there is something to this, but is it overblown?
The regular season usually ends in November, and the weather (usually) is not severe in November. Occasionally we see a snow game, but they are really pretty rare. I might argue Ohio State is no more prepared than Tennessee to play in the snow. Neither one plays football in the snow during the regular season. Temperature can be a factor, but if it's not really severe, keeping warm as a player doesn't seem like a big deal. If the temperature is severe, everybody, including the home team, is miserable.
On the other hand, it does feel like Southern teams have a home field advantage when it's hot and humid. So perhaps the argument that hot and humid favors Southern teams is akin to cold and wet favors Northern teams?