This will hopefully be the first step in letting other cold weather cities have superbowls.
The home team determines if roof is to be opened or closed 90 minutes before kickoff. The roof remains open unless precipitation or lightning is within the vicinity of the stadium, the temperature is below 40°F, or wind gusts are greater than 40 mph, in which case the roof is automatically closed. Once the roof is closed, it may not be reopened.[7]
also cold weather/outdoor superbowls do nothing but restrict certain teams.