These climates are the ones where the mean monthly temperature remains generally above 22 deg. C. and they occur in the tropical zone. They do not have a perceptible winter season. The major sub types of this type are the tropical rain-forest, tropical monsoon and the tropical savanna climates.The rain-forest climates are characterized by all the year round precipitation and they support dense evergreen forests of tall trees. The basis of the dense and tall forests is the high temperature and a large amount of precipitation, generally over 250 cms. The climates of the equatorial regions such as Zaire Basin and Amazon are of this type.In the monsoon type of tropical climates the rainfall is seasonal and generally it occurs in the summer season. Due to this the vegetation in these regions is of deciduous type, i.e. the trees shed their leaves during the dry season. India and her neighbors in the southeast Asia constitute a major area of this type of climate.The tropical savanna climate is the one in which the total amount of rainfall is lesser unlike the former two types where it is generally more than 200 cm. Due to lack of rainfall the typical type of vegetation in these regions is the open thorn type of forests and grasslands with occasional clumps of trees. Savanna type of climate is transitional between the tropical wet climates towards the equator and the dry climates towards the poles. Parts of northern Australia, Veld region of Africa and Venezuela are among the typical areas of this type.