Could be. I suppose 80 and humid vs 30 and cold is a larger delta than September games.Re climate I think the Pats have alluded to it actually being tougher to play in Miami in December after getting used to the cold weather up here for a few months. The Brady Pats sucked in Miami no matter what month though.
I always think it’s hilarious when they show shots of equipment managers holding up makeshift canopies on the sideline to shade the players. That new canopy that they built over the stadium that leaves the away team in the sun should be borderline illegal.