Super Bowl 49 big question: Why is roof open for first time all season?

The NFL is keeping the retractable roof open for Super Bowl 49 between the Patriots and Seahawks -- the first time all season that's been the case at University of Phoenix Stadium.

Temperatures will be in the 60s, with no chance of rain.

But how come the Cardinals don't open it more often? They've closed it 71 times and opened it 22 times since the stadium was built in 2006.

According to KTVK in Phoenix, temperatures hover around 100 for the season's first month. Later in the season, fans on one side complain the setting sun is too bright.

"For a quarter or more of the game you're staring right in to the sun. And (fans) have frankly made us aware loud and clear that that's not an optimal experience for them," Mark Dalton, vice president of media relations for the Cardinals, told KTVK.

The closed stadium also makes it louder, boosting Arizona's homefield edge. The Cardinals went 7-1 at home this season.

The NFL also kept the roof open for last week's Pro Bowl.

The Cardinals rarely open the roof at University of Phoenix Stadium. (USATSI)
The Cardinals rarely open the roof at University of Phoenix Stadium. (USATSI)
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