The region can be divided into three zones - highland, midland and lowland. The highland zone is towards the east of the region. This area experiences a rainy season between November and May with annual precipitation ranging from . The period between June and September is cold and dry. The midland zone, in the central part of the region, lies at a height of above sea level and faces between of rain every year. Finally, the lowland zone, at a height of gets between of rain per annum.