Omdurman (standard ArabicUmm 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 (6.1in) 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.