When planning a visit to Sliven in Bulgaria, it helps to know that temperatures typically range from 4°C (39°F) in January up to 29°C (84°F) during the peak of August. Our detailed climate overview is based on data from Zheravna, the region's most well-known city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
In Sliven, during the months of May, June and September you can expect comfortable weather, with average temperatures ranging from 22°C (72°F) to 26°C (79°F).
The colder weather is most prominent in the months of January, February and December.
When it comes to rainfall, Sliven experiences moderate variations in precipitation across the seasons. You can expect around 99 mm (3.9 in) of rain in May, dropping to 52 mm (2 in) in August.
