The 49ers had little trouble beating the Green Bay Packers in last year’s NFL playoffs. But that was in balmy San Francisco.

Sunday’s rematch is in Green Bay, where temperatures for the wild-card showdown at Lambeau Field are expected to dip below zero. The wind chill, according to the National Weather Service, could drop to 30 below.

“You can get frostbite within 30 to 40 minutes in these temperatures if you’re not covered up,” said Roy Eckberg, a meteorologist with the weather service in Green Bay.

A weather front expected to sweep through Wisconsin this weekend is even cold by Midwest standards. Some are expecting Sunday’s 3:40 p.m. CST game to rival the so-called Ice Bowl, played at Lambeau Field between the Packers and Dallas Cowboys in 1967, for the coldest NFL game on record. It was 13 degrees below zero that January day, with a wind chill of 48 below.

“It’s been about 15 to 20 years that we’ve seen an arctic outbreak this severe,” Eckberg said.

The winner of Sunday’s game will play either the Seattle Seahawks or Carolina Panthers in the divisional championship the following weekend. The loser calls it quits for the season.