Direct, radiant sunlight is what heats up artificial turf.  If your turf is in the shade and it’s 95 degrees outside, the turf will be near the ambient temperature.  Direct UV can heat turf up to temps above 160 degrees.  Thankfully, there is a solution to cooling turf down using HydroChill coated infill sand which retains moisture in the turf system.  This polymer coated sand absorbs and retains the moisture, slowly letting it evaporate out, thereby creating an evaporative cooling effect.  Southwest Greens of Florida stock and regularly installs HydroChill for clients who need 40 to 50 degree cooler turf.