It will be hot by Michigan standards when the Spartans play Arizona State in Tempe, AZ tomorrow.
Of course the humidity will be lower than on a day with Michigan near 100 degrees. So it won't quite feel as oppressive, but 100 degrees is hot regarless of humidity.
Temperature forecast near game time in Tempe, AZ on Saturday, September 8weatherbell.com
The game will start with a temperature around 99 degrees. By the end of the game it will have cooled to 93 degrees. The relative humidity will be a skin-drying 20 percent.