Description of the annual rainfall graph for Kano, Nigeria

This is due to the concentration of the sun, as in equator were the sun is more concentrated outputting 1kw/m2 at a constant rate means temperatures are generally high throughout the year, with cooler seasons and warmer seasons (view graph).Also to contribute to the warm weather is the dark forest areas in the closed savanna, due to being dark the trees absorb the heat, this is not as likely in the open savannas.

Located in the tropics means the sun has a reduced angle in the sky for part of the year, meaning the sun light has to penetrate through more atmospheres, and in the rainy seasons cloud, this reduces the temperature as energy is lost. Many other contributions affect the temperature, that clouds reflect heat causing less conduction, were the ground is heated to warm the atmosphere.

From the graph there is a distinct part of the month were the rain begins and end, this is from May to October, duration of six moths, and this is the main feature of the climate, the alternation of wet and dry seasons that occur when the heavy convectional storms form, that are two colliding fronts this causes very strong storms contributing to 80% of the annual rainfall in 4 months, these produce cumulonimbus clouds, torrential rain very dark clouds.