The temperature forecasts for Sunday's San Francisco 49ers-Green Bay Packers have dropped as the week has progressed.

The most recent estimates call for zero degrees with a wind chill of minus-30 degrees at Lambeau Field. The 4:40 pm ET kickoff is less than an hour before sunset and the temps are expected to drop below zero before it concludes.

The coldest game in NFL history was the so-called Ice Bowl at Lambeau. It was minus-13 degrees that January day in 1967 for that game between the Packers and Dallas Cowboys with a wind chill of minus-48.

If the game drops below minus-1, it will be the second-coldest game in Lambeau history.

At least it's expected to be clear in Green Bay on Sunday. The Packers asked the public help clear Lambeau of snow on Friday (for $10 an hours) from the most recent snow storm.

You'd expect the Packers would have the edge in cold temps, but as Sam Farmer of the LA Times points out, that may not be the case. The Packers are 3-4 at Lambeau when temps are at 6 degrees or below since 2002.

One of those losses was to the New York Giants when the Packers lost the 2007 NFC championship game when it fell to minus-1.