Omsk is a Russian city located in southwestern Siberia and the administrative center of Omsk Oblast. It is Russia`s second-largest city east of the Ural Mountains. The distance from Omsk to Moscow is 2,700 kilometres (1,700 mi).
Omsk is the administrative centre of Siberian Cossack Voisko, it also serves as the see of the bishop of Omsk and Tara, as well as the administrative seat of the Imam of Siberia.
Omsk is situated on the banks of the north-flowing Irtysh, at its confluence with the smaller Om River. The city has an altitude of 87 metres (285 ft) above sea level.
The climate is dry and continental, characterized by dramatic swings of weather. The average daily temperatures, taken over the past three decades, are 20 °C (68 °F) for July and −19 °C (−2.2 °F) for January, although temperatures can reach 45 °C (113 °F) in the summer and drop to −45 °C (−49 °F) in the winter. On average Omsk sees over 300 sunny days in any given year. Average annual rainfall is 315 millimetres