its fine in bad weather as there is some wooden structure to it, the roof is like a yurt but the walls are simpler, like a dome. It is an old one, so we had to paint it with UV paint to help waterproof it more. It also helps block sun. the newer ones are designed better. Southern Appalachia is very humid and rainy, hot in the summer so mold can be an issue but if you keep things swept, airflow and light a fire every now and then inside it helps.