 A tropical savanna is a grassland biome located in semi-arid to semi-humid climate regions of subtropical and tropical latitudes, with average temperatures remaining at or above all year round, and rainfall between and a year.They are widespread on Africa, and are found in India, the northern parts of South America, Malaysia, and Australia.The humid subtropical climate zone where winter rainfall (and sometimes snowfall) is associated with large storms that the westerlies steer from west to east.