Yes they did. And unlike Milwaukee, DTW is not located in the urban core, rather it is an outlying area. Actually near the airport is a sort of rural area, and the South end of the airport valleys so temperatures get much colder, especially at night. On February 20, 2015 when DTW officially had -13゚, when I drove by that spot on the South side of my car registered -22゚. I would not want the thermometer located there either, because thats sort of unfairly low, but I too am convinced that the current placement of the thermometer is causing readings to be a bit elevated compared to surrounding areas.