The first postseason game played today may be a cold one, but this second game will be. At kickoff, the expected temperature – the temperature, not the wind chill – is minus-2 degrees, making it potentially one of the coldest games in NFL history. The Packers’ Lambeau Field already was the site of the infamous Ice Bowl in 1967, in which the Packers and the Dallas Cowboys played in temperatures dipping as low as minus-13 degrees, with a wind chill of minus-46. And while watching the weather, pay close attention to how the quarterbacks adjust: Packers QB Aaron Rodgers returned late in the season to lead his team to key victories, while 49ers QB Colin Kaepernick can do as much damage with his legs as with his arm – which, in this weather, could well be the difference in the game.