Climate
The Köppen classification depends on average monthly values of temperature and precipitation. The most commonly used form of the Köppen classification has five primary types labeled A through E. These primary types are A) tropical, B) dry, C) mild mid-latitude, D) cold mid-latitude, and E) polar. The five primary classifications can be further divided into secondary classifications such as rainforest, monsoon, tropical savanna, humid subtropical, humid continental, oceanic climate, Mediterranean climate, desert, steppe, subarctic climate, tundra, and polar ice cap.
Trewartha climate classification
In the "Fi" climate type, all months have an average temperature below 0 °C, this is the region of the vast deserts of perpetually frozen Ocean in the North Pole, and the permanent ice plateaus of Antarctica and Greenland.