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 recently as the 13th-17th centuries A.D. Captain J.A. Grant, who reached Khartoum in 1863 with Captain Speke's expedition, thought the name was most probably from the Arabic "qurtum" ( ', i.e., "Carthamus tinctorius"), which was cultivated extensively in Egypt for its oil to be used as fuel. Some scholars speculate that the word derives from the Nubian word, "Agartum" ("the abode of Atum"), the Nubian and Egyptian god of creation. Other Beja scholars suggest "Khartoum" is derived from the Beja word, "Hartoom" ("meeting"). Additionally, the dream-interpreting magicians in Genesis 41:8 are referred to as חַרְטֻמֵּ֥י מצרים("Khartoumei Mitzrayim" - Magicians of