Last year it was 89 degrees at kickoff, and cooled down to 79 with light rain as the game went on. This year it was 89 degrees and sunny the entire game. It made a difference.
Yes, check out the weather graph of each day. Both games started at 89 degrees, but last year it cooled down 10 degrees during the game, and there was light rain. This year it was 89 from 1-4pm, so the whole game, and sunny.