Belgium vs Slovenia: Cooling and heating degree days - Regions — Heating degree degree

Belgium
-413.36 Degree days
in 2023
Slovenia
-443.46 Degree days
in 2023
Belgium rank
33rd
Slovenia rank
35th

Cooling and heating degree days - Regions — Heating degree degree over time

  • Belgium
  • Slovenia
-500-2500250500198120022023

How they compare

Belgium currently reports -413.36 Degree days against -443.46 Degree days in Slovenia, a difference of 30.1 Degree days.

The two have swapped places 21 times across 43 shared years of data; in 1981 it was Slovenia ahead.

Belgium ranks 33rd and Slovenia ranks 35th of 48 countries.

Across the 5 decades both report, Belgium averaged higher in 1 and Slovenia in 4.

Head to head by decade

Decade Belgium Slovenia Difference Ahead
1980s 121.34 Degree days 125.3 Degree days 3.96 Degree days Slovenia
1990s -14.88 Degree days -11.74 Degree days 3.14 Degree days Slovenia
2000s -133.71 Degree days -118.3 Degree days 15.42 Degree days Slovenia
2010s -146.02 Degree days -233.76 Degree days 87.74 Degree days Belgium
2020s -347.99 Degree days -324.97 Degree days 23.02 Degree days Slovenia

Averages of every year both report within each decade.

Frequently asked questions

Which has higher cooling and heating degree days - regions — heating degree degree, Belgium or Slovenia?
Belgium, at -413.36 Degree days against -443.46 Degree days in Slovenia as of 2023.
What is the difference in cooling and heating degree days - regions — heating degree degree between Belgium and Slovenia?
30.1 Degree days, with Belgium ahead.
How many years of comparable data are there for Belgium and Slovenia?
43 years are reported by both, from 1981 to 2023.
How do Belgium and Slovenia rank globally for cooling and heating degree days - regions — heating degree degree?
Belgium ranks 33rd and Slovenia ranks 35th of 48 countries.
Where does this data come from?
Organisation for Economic Co-operation and Development, published as Cooling and heating degree days - Regions — Heating degree degree days change compared to 1981-2010 average. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Belgium vs Slovenia: Cooling and heating degree days - Regions — Heating degree degree. Statizoid, drawing on Organisation for Economic Co-operation and Development. Retrieved 25 August 2026, from https://reference.statizoid.com/compare/cooling-and-heating-degree-days-regions-heating-degree-degree-days-change-compared-to/belgium/slovenia/

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About this data

Indicator
Cooling and heating degree days - Regions — Heating degree degree days change compared to 1981-2010 average
Unit
Degree days
Source
Organisation for Economic Co-operation and Development
Licence
OECD Terms and Conditions (attribution required)
Coverage
52 places, 2,236 data points, 1981–2023
Last refreshed

This dataset provides indicators on Cooling and Heating Degree Days, in large (TL2) and small (TL3) regions. Data definition and source Cooling Degree Days (CDD) quantify how hot a given period was, indicating the energy demand for cooling buildings. CDD is calculated as the sum of the differences between the daily mean temperature and a reference temperature of 22°C, for all days when the mean temperature exceeds 22°C. Heating Degree Days (HDD) quantify how cold a given period was, reflecting the energy demand for heating buildings. HDD is calculated as the sum of the differences between a reference temperature of 15°C and the daily mean temperature, for all days when the mean temperature falls below 15°C. Those indicators are based on Copernicus ERA5-Land. ERA5-Land is used as it provides harmonised, globally consistent coverage at fine spatial resolution (0.1 degree), enabling the production of comparable subnational indicators also where national meteorological data are not available at the required scale. These estimates may differ from official subnational climate statistics due to differences in methodological approaches, such as the use of reanalysis based top down modelling versus in situ observations, along with variations in input data sources, spatial resolution, and the models and algorithms used to generate temperature estimates. Definition of regions Regions are subnational units below national boundaries. OECD countries have two regional levels: large regions (territorial level 2 or TL2) and small regions (territorial level 3 or TL3). For more information, see the OECD Territorial grid (pdf) and the OECD Territorial Correspondence Table (xlsx). Cite this dataset OECD Regions, Cities and Local Areas database http://oe.cd/geostats. Further information OECD Local Data Portal OECD Regions and Cities at a Glance For questions and/or comments, please email RegionStat@oecd.org.