Moderate continental climate zone
Covers the Danubian Plain, the Western and Central Stara Planina Mountain and the lower areas of Kraishte, Ihtimanska and Sredna Gora mountain. Maximum temperatures reach 38-40 ° C, whereas minimum go below -20 ° C. The annual rainfall is 500-700 mm, with a minimum in February and maximum in June. The west and northwest winds are prevailing. The climate is favorable for growing grain, industrial crops, vineyards and fruits (apples, pears, apricots and plums).
Transitional continental climate
The area encompasses the Upper Trakyan Valley, the Zadbalkan area, the northern Tundzha hills and the Eastern Balkan Mountains. The average January temperature is from -1.5 to +1 ° C, average July - 22-24 ° C with maximum summer temperatures reaching 40 ° C. The annual rainfall is the same as the moderate-continental climatic region, but with more pronounced seasonal differences.
Mediterranean-continental climate zone
This area encompasses the valley of the Struma River, the areas south of Gotse Delchev, lower parts of the Eastern Rhodopes and Strandja Mountains. Heavy rain precipitation is typical during the winter months. Winter is mild with an average January temperature 1-2 ° C, spring comes earlier and summer is hot with an average July temperature 24-25 ° C.
Black Sea climate zone
The Black Sea climate zone sustains lower temperature amplitudes. The average temperature in January is 0-3,5 ° C, whereas in July it reaches 22-23 ° C. Rainfall is relatively stable throughout the seasons, preserving the typical country minimums and maximums.