As described in the previous article - the earth orbits the sun with it's axis tilted at an angle of about 23.4 degrees in relation to the Plane of the Ecliptic. The resulting effect of the sun's changing position in the sky causing the subsolar point to move between the tropics, and across the equator twice a year causing a change in the season's in the northern and southern hemisphere, and more locally in East Africa, the changing of the monsoon winds, and the alternating wet and dry seasons.
This article looks at the Kenya Coast's weather pattern in more detail and outlines a generalised climate model for this region.
The equatorial region's weather patterns are dominated by the Hadley Cell, an atmospheric circulation pattern occurring between the tropics that produce the easterly trade winds.
In the Hadley cell, air rises near the equator, flows out towards the poles at high altitude, descends back to the Earth's surface at the outer edges of the tropics, and completes the cycle by flowing back towards the equator near the earth's surface.