Yes, Namibias Diabas Omenje Granite can be used for exterior applications in very humid climates. Granite is known for its durability and resistance to weathering, making it suitable for outdoor use. It can withstand high humidity and moisture levels without deteriorating or warping, making it an excellent choice for humid climates. Additionally, the natural beauty and elegance of granite make it a popular option for exterior applications such as countertops, facades, and landscaping.