Why does Bulgaria receive snow in its lowlands for part of the year?

Bulgaria experiences snowfall in its lowlands primarily due to its moderate continental climate. This climate type is characterized by significant temperature variations, which allow for cold conditions during the winter months.1

While the country is partially tempered by Mediterranean influences in the south, the northern and central regions—including the Danube River valley—are subject to the broader continental patterns that bring colder air masses. The Balkan Mountains act as a climatic barrier, separating the continental climate of the north from the transitional climate found in the south. Consequently, the lowlands typically receive snow cover for an annual average of 25 to 30 days between mid-October and mid-May.12