The longest day of the year was also the coolest in part because of Dairy Queen's Ice Cream Social in Mount Clemens. The familiar DQ is a hotspot for neighbors in the surrounding area of 353 North Gratiot, visitors coming to town and travelers passing through. Just for fun here's the scoop on one of America's favorite summertime treats: The top ice cream producing states are California, Indiana, Texas, Pennsylvania, Illinois, and Minnesota.