Saw that during USSSA Eastern Nationals last year. It was early August, and late afternoon. Our day had ended much earlier, but even that morning there was easily a 10 degree difference stepping out onto the turf. (That's when I really appreciated my role as bench coach vs. base coach!).We were all sitting around the pool, watching the final game via the stream, and during a pitching change or offensive coaches conference, you could see the girls basically collapse onto the field. Several of us commented that it was probably better to just stay standing than get any closer to the ground.