synthetic turfA254-254?Natural grass? stays cooler because:

synthetic turfA254-254?Evapotranspiration? (water evaporating from soil/plants) cools the air.

synthetic turfA254-254?Soil acts as a heat sink, absorbing less radiation.

synthetic turfA254-254?Artificial grass? can get hotter because:

synthetic turfA254-254?Synthetic fibers absorb and retain heat? (especially dark-colored turf).

synthetic turfA254-254?No natural cooling mechanism? like live plants.

synthetic turfA254-254?? ?Data Point:

synthetic turfA254-254On a ?90°F (32°C) day, artificial turf can reach ?140–160°F (60–71°C)?—hot enough to burn bare feet.