Cooling and heating degree days - Regions — Cooling degree days by country
<p style="text-align: justify;">This dataset provides indicators on Cooling and Heating Degree Days, in large (TL2) and small (TL3) regions.</p> <p><strong>Data definition and source</strong></p> <ul> <li>Cooling Degree Days (CDD) quantify how hot a given period was, indicating the energy demand for cooling...
What the numbers show
Cooling and heating degree days - Regions — Cooling degree days is currently reported for 48 countries. The highest value is 1,455 Degree days in Brazil; the lowest is 0 Degree days in Ireland.
The median across all reporting countries is 132.61 Degree days, and the mean is 305.52 Degree days.
Over the past decade 33 countries rose and 14 fell. The largest increase was in Norway (up 20,006.3%), and the largest decrease in Ireland (down 100.0%).
Cooling and heating degree days - Regions — Cooling degree days: full country ranking
| # | Country | Latest | Year | 10-year change | Trend |
|---|---|---|---|---|---|
| 1 | Brazil | 1,455 Degree days | 2023 | up 28.7% | rising |
| 2 | India | 1,440 Degree days | 2023 | up 8.0% | flat |
| 3 | Colombia | 1,196 Degree days | 2023 | up 27.7% | rising |
| 4 | Australia | 1,195 Degree days | 2023 | down 8.1% | rising |
| 5 | Indonesia | 1,159 Degree days | 2023 | up 16.3% | rising |
| 6 | Tunisia | 986.89 Degree days | 2023 | up 25.1% | rising |
| 7 | Costa Rica | 841.41 Degree days | 2023 | up 28.5% | rising |
| 8 | Mexico | 834.33 Degree days | 2023 | up 39.9% | rising |
| 9 | Israel | 801.83 Degree days | 2023 | up 30.4% | rising |
| 10 | Peru | 671.29 Degree days | 2023 | up 39.9% | rising |
| 11 | Malta | 486.49 Degree days | 2023 | up 29.5% | rising |
| 12 | Argentina | 414.6 Degree days | 2023 | up 15.1% | rising |
| 13 | South Africa | 334.11 Degree days | 2023 | up 10.5% | rising |
| 14 | United States | 310.63 Degree days | 2023 | up 17.5% | rising |
| 15 | Greece | 298.9 Degree days | 2023 | up 24.3% | rising |
| 16 | Spain | 294.05 Degree days | 2023 | up 55.3% | rising |
| 17 | France | 271.43 Degree days | 2023 | up 32.2% | rising |
| 18 | Japan | 225.75 Degree days | 2023 | up 38.6% | rising |
| 19 | Italy | 210.52 Degree days | 2023 | up 63.2% | rising |
| 20 | Portugal | 207.19 Degree days | 2023 | down 1.2% | rising |
| 21 | Bulgaria | 186.39 Degree days | 2023 | up 80.3% | rising |
| 22 | Hungary | 147.42 Degree days | 2023 | down 2.4% | volatile |
| 23 | Croatia | 144.88 Degree days | 2023 | up 7.9% | volatile |
| 24 | Serbia | 135.28 Degree days | 2023 | up 3.8% | rising |
| 25 | Romania | 129.94 Degree days | 2023 | up 51.3% | volatile |
| 26 | Slovenia | 47.32 Degree days | 2023 | down 35.1% | volatile |
| 27 | Czechia | 30.4 Degree days | 2023 | down 10.9% | volatile |
| 28 | Austria | 28.73 Degree days | 2023 | down 11.8% | volatile |
| 29 | Poland | 28.3 Degree days | 2023 | down 0.6% | volatile |
| 30 | Russia | 25.34 Degree days | 2023 | up 53.4% | rising |
| 31 | Germany | 25.1 Degree days | 2023 | down 1.9% | volatile |
| 32 | Switzerland | 21.2 Degree days | 2023 | up 127.1% | volatile |
| 33 | Lithuania | 15.4 Degree days | 2023 | up 45.1% | volatile |
| 34 | Netherlands | 13.44 Degree days | 2023 | down 20.0% | volatile |
| 35 | Belgium | 13.21 Degree days | 2023 | down 17.7% | volatile |
| 36 | Latvia | 8.84 Degree days | 2023 | up 27.7% | volatile |
| 37 | Luxembourg | 8.71 Degree days | 2023 | down 18.7% | volatile |
| 38 | Estonia | 7.05 Degree days | 2023 | up 38.7% | volatile |
| 39 | Canada | 6.53 Degree days | 2023 | up 59.9% | volatile |
| 40 | Chile | 4.27 Degree days | 2023 | down 12.7% | volatile |
| 41 | Finland | 1.24 Degree days | 2023 | up 33.8% | volatile |
| 42 | United Kingdom | 0.5316 Degree days | 2023 | up 14.0% | volatile |
| 43 | New Zealand | 0.4236 Degree days | 2023 | up 117.9% | volatile |
| 44 | Sweden | 0.2882 Degree days | 2023 | up 2,528.9% | volatile |
| 45 | Norway | 0.181 Degree days | 2023 | up 20,006.3% | volatile |
| 46 | Denmark | 0.0088 Degree days | 2023 | down 98.9% | volatile |
| 47 | Iceland | 0 Degree days | 2023 | — | volatile |
| 47 | Ireland | 0 Degree days | 2023 | down 100.0% | volatile |
Regions and income groups
Aggregates are excluded from the country ranking above so that a region can never outrank a country.
- China (People's Republic of) 255.73 Degree days
- Korea 226.4 Degree days
- Slovak Republic 41.7 Degree days
About this data
<p style="text-align: justify;">This dataset provides indicators on Cooling and Heating Degree Days, in large (TL2) and small (TL3) regions.</p> <p><strong>Data definition and source</strong></p> <ul> <li>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.</li> <li>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.</li> </ul> <div id="subgroup-hdd" class="flex flex-col gap-2"> <div class="flex items-start gap-2" style="text-align: justify;">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.</div> <div class="flex items-start gap-2" style="text-align: justify;"><br />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.</div> </div> <p><strong>Definition of regions</strong></p> <p style="text-align: justify;">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 <a href="https://webfs-cfe.oecd.org/files/.Stat/region/OECD_territorial-grid_TL2024.pdf">(pdf)</a> and the OECD Territorial Correspondence Table <a href="https://webfs-cfe.oecd.org/files/.Stat/region/OECD%20Territorial%20correspondence%20-%20TL2024c.xlsx">(xlsx)</a>. </p> <p><strong>Cite this dataset</strong></p> <p>OECD Regions, Cities and Local Areas database <a href="http://oe.cd/geostats">http://oe.cd/geostats</a>.</p> <p><strong>Further information</strong></p> <ul> <li><a href="https://localdataportal.oecd.org/">OECD Local Data Portal</a> </li> <li><a href="https://www.oecd.org/en/publications/oecd-regions-and-cities-at-a-glance-2024_f42db3bf-en.html">OECD Regions and Cities at a Glance</a></li> </ul> <p>For questions and/or comments, please email <a href="mailto:RegionStat@oecd.org">RegionStat@oecd.org</a>.</p>