With 30 minutes in the books and the temperature gradually dropping, the Packers have found a way to stay within three points of the 49ers.
A late field goal by Mason Crosby from 34 yards out narrowed the gap to 13-10 at halftime.
A nine-play, 59-yard drive by the home team ended in the three-pointer after the 49ers scored a touchdown to re-establish a six-point lead.
In the last two meetings between the 49ers and Packers, quarterback Colin Kaepernick shredded Green Bay on the ground in January (181 yards) and then through the air in September (421). This time, Kaepernick has 117 passing yards and 47 rushing yards through 30 minutes.
After a very slow start, Packers quarterback Aaron Rodgers has completed 11 of 15 total passes for 97 yards and a touchdown. Rookie running back Eddie Lacy has added 40 rushing yards on 12 carries.
Meanwhile, a wind chill warning kicks in at 7:00 p.m. ET, as the temperature begins to plunge to an overnight low of 24 below.