Why does southeastern Azerbaijan receive more rainfall than other parts of the country?

Southeastern Azerbaijan receives the highest levels of precipitation in the country—ranging from 47 to 55 inches (1,200 to 1,400 mm) annually—because it possesses a humid subtropical climate.2

This region is geographically defined by the Talish (Talysh) Mountains and the Länkäran Lowland, which borders the Caspian Sea. Unlike the dry subtropical climate found in central and eastern Azerbaijan, the southeastern area's unique climatic conditions result in most of its significant rainfall occurring during the colder months.12