(i) The convectional rainfall: when water vapors rise up, they reach high above the surface of the earth and cool down to form clouds. When clouds cannot hold any more water, they fall down as rainfall.

(ii) The Orographic rainfall: It occurs when the moist air rises up the mountain, forms the orographic clouds and falls as rainfall.

(iii) The Cyclonic rainfall: It occurs when the cyclonic winds of different temperature, humidity densities meet.