Kharkov is the second largest city in Ukraine. It was the first capital of Soviet Ukraine, now the administrative center of the Kharkov Oblast (province), as well as the administrative centre of the surrounding Kharkovskyi Raion (district) within the oblast. As of 2006, its population is 1,461,300. Kharkov is located in the northeastern region of Ukraine. Historically, Kharkov lies in the Sloboda Ukraine region (Slobozhanshchyna also known as Slobidshchyna), in which it is considered the main city. The city rests at the confluence of the Kharkov, Lopan, and Udy Rivers, where they flow into the Northern Donets watershed. Kharkov`s climate is moderate continental: cold and snowy winters, and hot summers. The seasonal average temperatures are not too cold in winter, not too hot in summer (-6.9 °C in January, and 20.3 °C in July). The average rainfall totals 513 millimeters per year, with the most in June and July.