The primary differences between steam and sauna baths are the temperature, humidity levels and room construction. Steam is a wet environment with temperatures usually in a range of 110 to 125 degrees F and relative humidity close to 100%. A sauna is a dry environment with temperatures ranging between 165 to 185 degrees F and low humidity levels of 10 to 20%. Sauna rooms feature walls and benches made of soft woods such as cedar, hemlock, alder or spruce, while steam baths require moisture resistant walls such as porcelain tile, marble, granite, travertine or acrylic material.