Chad is bound by Libya on the north; by Sudan on the east; by the Central African Republic on the south; and by Cameroon, Nigeria, and Niger on the west.
Chad is dominated by the low-lying Chad Basin, which rises gradually to mountains and plateaus on the north, east, and south. In the east are the plateaus - Ennedi and Ouaddaï, which rise to more than 3,000 ft. The greatest elevations are reached in the Tibesti massif in the north, which touches 11,204 ft in height at Emi Koussi. The northern half of the republic lies in the Sahara. The important rivers are the Logone and Chari (Shari) which lie in the southwest and flow into Lake Chad. The lake doubles in size during the
rain season.
While the northern portion of Chad is hot and arid, the central section has three seasons - hot summers from March to July; from July to October
rain, measuring 250 to 750 mm are experienced while the remaining months experience cool weather. The southern section has similar seasons but receives about 1,145 mm of
rain in the same four months.
