 The 3563 meters-high Mount Ughtasar is overlooking at Sisian from the north, while the Mount Mets Ishkhanasar (3552 meters) is located 13 km east of the town.Being nested in an alpine climate zone, the weather of Sisian is characterized with cold/snowy relatively long winters, and mild/warm relatively short summers.The average temperature in January is –3.8 °C and +20.2 °C in July.