The Wolverines game Saturday, September 16, 2017 will have weather more like early August than mid-September.
Temperatures for tailgating will start just a touch cool, with maybe a very light jacket needed for some of you. You won't need that jacket long. By 10 a.m. temperatures should be around 70deg.
Full sunshine will make the temperatures warm quickly. The warmest temperature during the game will be close to 80deg on the thermometer. It's not the thermometer temperature you'll feel out in the stands.