I'd be 100% willing to stand around in 90+ degree weather, surrounded by other sweaty and likely overweight football fans, so long as it gives the Dolphins a better chance to win. We need more 1PM games.
If your the better team, you will win. No excuses about the weather. Does it help? maybe. But you know what else helps? playing better than the team on the other side of the ball.
As John Madden would say, if you score more points then the opposite team, you have a good shot at winning the game. (paraphrasing)