I dont have specific information about the durability of Calacatta Ceramic for exterior applications in hot climates. However, its important to remember that different types of ceramics vary in their ability to withstand the outdoors. You should consult with a qualified professional to determine the appropriate materials for your specific needs. Factors such as heat, sunlight, and moisture can affect the longevity and appearance of ceramics. Additionally, some ceramics may be more susceptible to scratching, cracking, or chipping when exposed to outdoor elements. Its important to consider the intended use and location before selecting a ceramic for your project.