The climate of the Adamawa Plateau is classified as tropical of the Sudan type. It has only two seasons; November begins the dry period, and April the wet. Rainfall here averages 900 to 1,500 mm per year and decreases further north. May and June are the wettest, with occasional tornadoes; August is another rainfall peak. In addition, temperatures dip from November to January, as conditions similar to those that cause winter in temperate climes take at least a tentative hold. Temperatures rise due to the Harmattan beginning in January, reaching a high in April. Torrential rains in May and June bring temperatures down once again.