Tropical rainforest
In Group A, there are three types of climate: tropical rainforest climate (Af), tropical monsoon climate (Am) and tropical wet and dry or savanna climate (Aw or As). All of the three climates are classified by their Pdry (short for precipitation of the driest month). Tropical rainforest climate’s Pdry should be greater or equal than 60 mm (2.4 inches). Tropical monsoon climate’s Pdry should be in the range from formula_1to 60 mm. Tropical wet and dry or savanna climate’s Pdry should be less than formula_1.