How much rain does Russia receive in a year?

Russia is a vast country and the amount of rainfall varies greatly from region to region. The western part of Russia, which includes Moscow and St. Petersburg, receives an average of 20 to 30 inches of rain per year. The central and eastern regions receive less rainfall, with some areas getting as little as 10 inches per year. The southern regions, which include the Black Sea coast and the Caucasus Mountains, receive the most rainfall, with some areas getting up to 40 inches per year.