Worldwide zones of tropical monsoon climate (Am). Tropical monsoon climate, occasionally also known as a tropical wet climate or tropical monsoon and trade-wind littoral climate in climate classification, is a relatively rare type of climate that corresponds to the Koeppen kÃ¶ppen climate classification Category. amorldwide zones of tropical monsoon climate (Am). Tropical monsoon climate, occasionally also known as a tropical wet climate or tropical monsoon and trade-wind littoral climate in climate classification, is a relatively rare type of climate that corresponds to the Koeppen kÃ¶ppen climate classification Category. am