Nile monitors do not need humidity in their habitat, but they do enjoy a more humid environment. They can be kept in a variety of habitats, from dry desert climates to more tropical rainforest habitats. It’s important to note that Nile monitors are very adaptable and can survive in a wide variety of habitats, so it’s important to adjust the humidity level in their habitat depending on where you live. If your area is relatively dry, you can increase the humidity level by adding a water bowl or spraying the enclosure with water a few times each day.