SYNTHETIC TURF IS 40-70 DEGREES HOTTER THAN SURROUNDING AIR TEMPERATURES ON WARM SUNNY DAYS
On clear warm days, synthetic turf fields get superheated to temperatures from 120 to 180 degrees F. Playing on synthetic turf can melt shoes, blister hands and feet, and induce dehydration and heatstroke.
SURFACE TEMPERATURE OF SYNTHETIC TURF
TEMPERATURE DIFFERENCE BETWEEN NATURAL & ARTIFICIAL TURF
Heat Related Illness Risk
Penn State’s Center for Sports Surface Research: Synthetic Turf Heat Evaluation – Progress Report; January 2012
Summary: heat high on plastic as well as waste tire infill - no “magic bullet” to cool off the fields made with these materials.
From Synturf.org "The promoters of artificial turf admit openly that the field runs 10° to 30° F hotter than a natural grass field. That admission alone however does not tell the whole story. Often, 10 or 30 degrees will tip the surface temperature past a dangerous point. Skin injury can result from a ten-minute contact with a surface that runs about 120° F.
According to Joseph Shirley, Director of Facilities at Boston College, Chestnut Hill, Newton/Brookline, Massachusetts, the surface is watered down prior to game time in order to cool down the surface. During summer youth camp programs, in a hot day, every 20 minutes the children are taken off the field so that the field can be cooled down."