Khartoum main Nile ("see map, upper right") as it zigzags through northern Sudan into Egypt at Lake Nasser. Khartoum is relatively flat, at elevation , as the Nile flows northeast past Omdurman to Shendi, at elevation about away. Under Köppen's climate classification system, Khartoum features a hot arid climate, with only the summer months seeing noticeable precipitation. The city averages a little over of precipitation per year. Based on annual mean temperatures, the city is one of the hottest major cities in the world. Temperatures routinely exceed in mid-summer. Its average annual high temperature is , with six months of the
Khartoum (state) locality are the tribe of Shiheinat, and in Khartoum North the tribes of Abdallab and Batahin. In the East Nile are the tribes of Abu Dileig, Batahin, and Kawahla, with the tribe of Iseilat in Um-Dowan. Most of the population works in government service, the private sector, and banking. There is also a large number of merchants, and migrants and displaced people working in marginal activities. In the countryside most people are engaged in agriculture and grazing and thus supply the capital, Khartoum, with vegetables, fruits, and dairy products. There are also some residents living on the banks of the