The Weather and Climate in Chad
The Republic of Chad has three climatic regions formed by its weather system known as inter-tropical front. These regions include the Saharan Region in the north, the Sahelian Region in the country’s central part, and the Sudanian Region in the south. The Saharan region which represents the northern third of the country, receives only very little rain throughout the year, with annual precipitation of less than 50 mm (2 in.). The areas under this region are the Borkou-Ennedi-Tibesti prefectures with northern portions of the Kanem, Batha and Biltine districts.
The Sahelian region is Chad’s central part, consisting of a semi-arid, 500-kilometer wide belt with a rainy season from June to early September and a long dry season from October to May. During the wet season, the area receives a yearly precipitation raning from 300 mm to 600 mm (11.8 in. to 23.6 in.) on the areas of Lac and Chari-Baguirmi prefectures eastward to the Sudanese frontier through Guera, Ouaddai and northern Salamat prefectures.
The Sudanian region in the south is humid and with high temperatures throughout the year but its rainy season from April to October brings in an annual rainfall average of 900 mm (35.4 in.). The areas in the region include the northern prefectures of Mayo-Kebbi, Tandjile, Logone Occidental, Logone Oriental, Moyen-Chari and southern Salamat. The temperature in its cool season drops to 27˚C in January and rises to 40˚C in the hot months of March, April and May. The country receives sunlight at an average 5.9 hours per day in August and 10.1 hours per day in February.