Geography. Selenge aimag is located in northern Mongolia, between Orkhon and Selenge river basins and forest steppe region with hills and mountains. It has a total area of 43 thousand square kilometers and borders with Russia to the north, Khentii aimag to the northeast, Tuv aimag to the southeast and southwest, and Bulgan aimag to the west. Some of the big lakes, including Burenkhaan, Bayankhaan, Tovkhonkhaan, Dulaankhaan, Delgerkhaan and Songolbuteel, are located in Selenge aimag. Selenge province is elevated at 1,427 to 2,226m above sea level.
Meteorology. Selenge aimag has long, cold winters and short summers which gets occasionaly cold. It gets really hot during the daytime, really cold at night times and wind speeds up during the day and calms down at nights. The aimag also lacks in moisture. All the weather conditions are due to the severe continental climate that dominates the whole country. Annual average low air temperature is about -1.9°C, an average high is +1.1°C, median temperature is -0.3°C. July is the hottest and January is the coldest month of the year. The area of Selenge aimag receives an average about 250.1-301.0mm of precipitation annually, with the largest share being received in the warm season. The minimum temperature reaches -35°C to -41°C during December and January; the maximum temperature reaches +30°C to +36°C during July and August, with the highest ever record heat of +39°C in the Shaamar area. Wind with 12 to 17m/sec speed occurs during spring and fall.