I am unsure of the humidity I think its packed in. It is a stick on dial type and it has said 62% for a few days now. I have a small water bowl over the edge of the heating pad so it should be good at least 65%. My snake looks hydrated and is fairly happy. It has some damp spagnum moss in its hide and that retains heat well so it is possibly a bit warmer in there. When I return home in two weeks I am getting a brand new setup that is larger and has a protected heating bulb and underfloor heater on a pulse proportional thermostat, and a digital hygrometer.