When you stage football playoff games in January, miserable weather is always a possibility. The extended forecast isn't friendly for a couple of NFL playoff games this week.
The Houston Texans, Detroit Lions and Dallas Cowboys play in domes, so those teams won't be bothered. There is a 58% chance of precipitation for the Philadelphia Eagles at Tampa Bay Buccaneers game on Monday night according to Yahoo Weather, but with temperatures between a high of 70 and a low of 62. It shouldn't be that bad, though that could change if there's a rainstorm.