The Republic of Burundi also known as “the Heart of Africa,” is a landlocked country in the Great Lakes Region of Eastern Africa bordering Rwanda to the North, Tanzania to the East and South and the Democratic Republic of Congo to the West, with its south-western border adjacent to Lake Tanganyika and lies between 2º30’ and 4º30’ latitude South and between 28º50’ and 30º53’30’ longitude East.
The country has a land area of 27,834 km² of which 25,650 square kilometers is land and 2180 square kilometers is Water. The farthest headwater of the Nile, the Ruvyironza River, has its source in Burundi.
Burundi has a tropical highland climate, with a considerable daily temperature range in many areas. Temperature also varies considerably from one region to another, chiefly as a result of differences in altitude. The central plateau enjoys pleasantly cool weather, with an average temperature of 20 °C (68 °F). The area around Lake Tanganyika is warmer, averaging 23 °C (73.4 °F); the highest mountain areas are cooler, averaging 16 °C (60.8 °F). Bujumbura’s average annual temperature is 23 °C (73.4 °F).
The country has four seasons which can be distinguished as the long dry season (June–August), the short wet season (September–November), the short dry season (December–January), and the long wet season (February–May).
Most of Burundi receives between 1,300 and 1,600 millimeters of rainfall a year. The Ruzizi Plain and the northeast receive between 750 and 1,000 millimeters