In climatology, what does the Köppen climate classification letter 'D' signify?

💡 Solution & Explanation

In the Köppen climate classification system, the letter 'D' denotes snow forest or continental climates characterized by warm summers and cold winters where the average temperature of the coldest month drops below zero degrees Celsius. Tropical rainy climates are designated by the letter 'A', while arid climates carry the letter 'B' and polar climates are represented by 'E'.