Yes, Turkeys Noce Walnut Travertine can be used in exterior applications in very rainy climates. Travertine is a durable natural stone and is commonly used in outdoor settings. However, it is important to ensure that the stone is properly sealed and maintained to enhance its water resistance and durability. Regular cleaning and resealing may be needed to protect the stone from excessive moisture and prevent staining or damage. Consult with a professional or the manufacturer for specific recommendations and guidelines for using Noce Walnut Travertine in a rainy climate.