Surfaces absorb and emit varying degrees of heat based on color and material. The photo shows four adjacent surfaces at the same time on a summer day in Chicago. The new black asphalt has the highest temperature at 126 degrees, while the new white concrete is almost 20ºF less, at 108ºF.
![](https://leeduser.buildinggreen.com/sites/default/files/credit/checklists/heat%2520gun%2520temps.jpg)