Cooling and heating degree days by country - annual data

In 2025, Bulgaria's cooling and heating degree days by country increased by 6.9% compared to 2024, reaching 2,325.

Bulgaria accounts for 82.2% of the EU-27 total of 2,828.

Bulgaria ranks 19th out of 27 EU member states with reported data — in the bottom half of the distribution.

Over the past five years, the indicator has grown by 0.4% (from 2,314 in 2020).

Source: Eurostat dataset nrg_chdd_a, accessed via the eupublicdata pipeline.