Cooling and heating degree days by country - annual data

In 2025, the EU-27 figure for cooling and heating degree days by country was 2,828 .

That is a 3.6% rose versus 2024 (2,729).

Over the five years before that, the EU-27 aggregate moved 1.2% higher.

Across member states, Finland reported the highest value (5,025, 2025) and Malta the lowest (314.7, 2025) — a ratio of 16.0× between the two ends of the range.

The figures below come from Eurostat dataset nrg_chdd_a; every value links back to the canonical source.