Our Yamaha viking holds a lot of heat in sitting area but we have a partial windshield so not as much wind flow and could cause a vortex in it but hot as hell in 25+ weather.
My dad has a 2011 ranger 800 on hot days the seat gets so hot you almost can't sit on it. Nice in the winter though. You might cool it down with some reflective tape
We rode Red Water today. Used a thicker bed in the box for the dog. And that kept the heat from him. We could feel heat through our seats at the end of the day. Got about 4.5 hrs of ride time in today.