UPDATE: It is now looking like the coldest air is moving into Green Bay 6-12 hours later than expected, with the latest forecast for a 6 p.m. temperature being +1 deg. F, which would not break a record.
The latest GFSx MOS temperature forecast is now
-8 deg. F -10 deg. F -8 deg. F -4 deg. F +1 deg. F for game time in Green Bay on Sunday evening for the playoff game between the Packers and the 49ers. This is getting awfully close to the record coldest NFL game temperature of -13 deg. F, set Dec. 31, 1967 at Lambeau Field during “The Ice Bowl”, the NFL Championship game between the Packers and Dallas Cowboys.
The 2nd coldest game was Jan. 10, 1982 at Riverfront Stadium during the AFC Championship game between Cincinnati Bengals and San Diego Chargers, at -9 deg. F, so Sundays game might take the #2 spot instead.
The deciding factor will be the timing of how fast the coldest air moves in on Sunday. The air mass is plenty cold enough to break the record, with a Monday high temperature forecast of -14 deg. F.
The top 10 coldest NFL games are listed here. Makes my hands hurt just thinking about it.