I'm pretty headstrong about temps. This time of year, most deer are well on their way of growing their winter coats. I've read a number of studies that say at this point in the year, a whitetail really can't stand temps once they get up to about 55 degrees. It just physically too taxing on them to move a lot.
This has been proven true here in Virginia. Higher temps shut down the movement. The years we have really warm temps during the rut, trail cam evidence shows that most of the activity is during the night time hours.
In these situations, mornings are always the best sit it seems because that is the coolest part of the day.
Young bucks are most often the ones that seem to "violate" this theory. They will move when temps are up cruising and pushing bedded does out.
I've got a buddy who doesn't subscribe to this. He points out that deer move during much warmer weather throughout the year. However, I keep telling him the difference is in the deer's coat. A summer coat allows them to move at much higher temps without getting overheated.
Sorry for the long post. Just one of the things I'm really interested in.