Yes, Brazils Green Wish Granite can be used for exterior applications in very rainy climates. Granite is a highly dense and durable natural stone, making it suitable for outdoor use in various weather conditions, including rain. It is resistant to water absorption, staining, and is also frost resistant. However, proper installation and sealing are essential to ensure the longevity and performance of the granite in such conditions. Additionally, regular maintenance, such as resealing, may be required to protect the stone from any potential water damage or discoloration.