Week 13 of the NFL season has arrived, which means that a December full of cold-weather games are just about to get underway.
It's about this time in the season when winter weather really starts to become a factor in terms of wins and losses. Not only does the weather affect teams' regular-season losses, but over the years it seems to have adversely affected playoff outcomes as well.
Since teams like New England, Pittsburgh, Green Bay and Baltimore are used to playing in cold weather, their records typically do not falter.
Meanwhile, teams such as Dallas, San Francisco, Oakland and Minnesota are notorious for struggling once the temperatures drop.
Seeing teams like Minnesota, Detroit and St. Louis struggling in cold weather may come as a surprise, as they are all cities with winters that find temperatures often dropping below zero, but the thing to remember is that their football teams all play in domes.
For this same reason, dome teams notoriously struggle in the playoffs.
For example, prior to moving to the indoor Metrodome, the Vikings had played in four Super Bowls; they have not appeared in a Super Bowl since, nor have they been very successful in the playoffs.
In fact, outdoor teams have won 43 of the last 45 Super Bowls.
It is worth noting that there is a mixture of warm- and cold-weather teams that sit in the middle of the pack as far as wintertime success goes.
Over the past 10 years, the Browns, Bills, Redskins and Jets have finished about .400 in games below 40 degrees, while warm-weather teams like the Jaguars, Dolphins and Chargers all rank ahead of them.
The following slides list the NFL's five worst cold-weather teams, based on winning percentages in games below 40 degrees since the year 2000.
Teams who have not played in 10 or more cold-weather games since 2000 are exempt from the list.
Those teams are the Lions (0-9), the Cardinals (0-6), the Rams (1-7), the Buccaneers (1-5), the Saints (2-5) and the Falcons (2-1).