The vegetation types as described above are conditioned by the climatic factors, which in turn determines the amount of rainfall received in the area. The rainfall in Bauchi State ranges between 1300mm per annum in the south and only 700mm per annum in the extreme North. This pattern is due to the fact that in the West African sub-region, rains generally come from the south as they are carried by the Sought Westerlies. There is, therefore, a progressive dryness towards the north, culminating in the desert condition in the far north.
Consequently, rains start earlier in the southern part of the state, in April with the highest record of 1300mm per annum and last longer. In contrast, the northern tip of the state receives the rains late usually around June/July and records the highest amount of 700mm per annum.
The weather experienced in the south and the north varies considerably. In the south, it is humidly hot during the early part of the rainy season. In the north, the hot, dry and dusty weather lingers on for a while. Under these leaders, the state has witnessed steady development in economic, political and socio-cultural spheres.