I don't believe they should be. From the NFL Rule Book ... The severe cold weather that is predicted in Green Bay is a threat to the health and safety of those working in the stadium, the fans and the players. IMO, the game should be postponed and/or moved to another location. The NFL is recklessly exposing people to those severe conditions and the game will be besmirched if the health of people, the performance of the players and the outcome of the game if affected by the cold.