Do Siberian tigers live in rainforests?

No, white Siberian tigers do not live in rainforest's. However white Bengal tigers can sometimes be found, a white Bengal tiger is not an albino, but the genes inside it are slightly different to that of an ordinary Bengal tiger, the difference gives it white-ish fur.

White Siberian tigers are found in Mountainous area's with lots of snow. Mainly places like Russia and Siberia.