Omdurman (standard Arabic Umm Durmān أم درمان) is the largest city in Sudan and Khartoum State, lying on the western banks of the River Nile, opposite the capital, Khartoum. Omdurman has a population of 2,395,159 (2008) and is the national centre of commerce. With Khartoum and Khartoum North or Bahri, it forms the cultural and industrial heart of the nation.
Omdurman features a hot desert climate, with only the months of July and August seeing significant precipitation. Khartoum averages a little over 155 millimetres (6.1 in) of precipitation per year. Based on annual mean temperatures, Omdurman is one of the hottest major cities in the world. Temperatures may exceed 53 °C (127 °F) in mid-summer.
Its average annual high temperature is 37.1 °C (99 °F), with six months of the year seeing an average monthly high temperature of at least 38 °C (100 °F). Furthermore, throughout the year, none of its monthly average high temperatures falls below 30 °C (86 °F). This is something not seen in other major cities with hot desert climates such as Riyadh or Baghdad. Temperatures slightly cool off during the night for only 3 months during the year, with Khartoum's lowest average low temperature of the year just above 15 °C (59 °F). The city literally does not experience seasons, just like most parts of the Arabian peninsula and north-eastern Africa where it's either hot or very hot all year long.