Armenia vs Luxembourg: Cooling and heating degree days - Cities and FUAs
Cooling and heating degree days - Cities and FUAs over time
- Armenia
- Luxembourg
How they compare
Luxembourg currently reports 1,998 Degree days against 162.92 Degree days in Armenia, a difference of 1,835 Degree days.
That makes Luxembourg's figure about 12.3 times Armenia's.
Across all 76 years both countries report, Luxembourg has been ahead every year.
Armenia ranks 2nd and Luxembourg ranks 1st of 2 countries.
Luxembourg has averaged higher in every one of the 8 decades both report.
Head to head by decade
| Decade | Armenia | Luxembourg | Difference | Ahead |
|---|---|---|---|---|
| 1950s | 273.97 Degree days | 2,679 Degree days | 2,405 Degree days | Luxembourg |
| 1960s | 290.66 Degree days | 2,703 Degree days | 2,412 Degree days | Luxembourg |
| 1970s | 263.37 Degree days | 2,675 Degree days | 2,412 Degree days | Luxembourg |
| 1980s | 232.4 Degree days | 2,649 Degree days | 2,417 Degree days | Luxembourg |
| 1990s | 208.69 Degree days | 2,481 Degree days | 2,273 Degree days | Luxembourg |
| 2000s | 226.89 Degree days | 2,367 Degree days | 2,141 Degree days | Luxembourg |
| 2010s | 196.9 Degree days | 2,333 Degree days | 2,136 Degree days | Luxembourg |
| 2020s | 230.27 Degree days | 2,116 Degree days | 1,886 Degree days | Luxembourg |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher cooling and heating degree days - cities and fuas, Armenia or Luxembourg?
- Luxembourg, at 1,998 Degree days against 162.92 Degree days in Armenia as of 2025.
- What is the difference in cooling and heating degree days - cities and fuas between Armenia and Luxembourg?
- 1,835 Degree days, with Luxembourg ahead.
- How many years of comparable data are there for Armenia and Luxembourg?
- 76 years are reported by both, from 1950 to 2025.
- How do Armenia and Luxembourg rank globally for cooling and heating degree days - cities and fuas?
- Armenia ranks 2nd and Luxembourg ranks 1st of 2 countries.
- Where does this data come from?
- Organisation for Economic Co-operation and Development, published as Cooling and heating degree days - Cities and FUAs. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
<p align="justify">This dataset provides indicators of Cooling and Heating Degree Days (CDDs and HDDs) for FUAs and cities. CDDs and HDDs are measurements used to estimate energy usage based on outdoor temperature. CDD measures the demand for cooling, while HDD measures the demand for heating, both calculated relative to a baseline temperature.</p> <h3>Data sources and methodology</h3> <p align="justify"> The indicators use 0.1-degree resolution grids from the <a href=https://developers.google.com/earth-engine/datasets/catalog/ECMWF_ERA5_LAND_DAILY_AGGR>ERA5-Land dataset</a>. 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. Annual CDDs are the sum over a year of the differences between the daily mean outdoor air temperature and the threshold temperature when the outdoor temperature is above the threshold temperature. HDDs are the sum over a year of the differences between the threshold temperature and the daily mean outdoor air temperature when the outdoor temperature is below the threshold temperature. Threshold temperatures are set to 22°C for CDDs and 15°C for HDDs.</p> <p align="justify"> 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. </p> <h3>Defining FUAs and cities</h3> <p align="justify">The OECD, in cooperation with the EU, has developed a harmonised <a href="https://www.oecd.org/en/data/datasets/oecd-definition-of-cities-and-functional-urban-areas.html">definition of functional urban areas</a> (FUAs) to capture the economic and functional reach of cities based on daily commuting patterns <a href=https://doi.org/10.1787/9789264174108-en>(OECD, 2012)</a>. FUAs consist of: <ol> <li><b>A city</b> – defined by urban centres in the degree of urbanisation, adapted to the closest local administrative units to define a city.</li> <li><b>A commuting zone</b> – including all local areas where at least 15% of employed residents work in the city.</li> </ol> The delineation process includes: <ul> <li>Assigning municipalities surrounded by a single FUA to that FUA.</li> <li>Excluding non-contiguous municipalities.</li> </ul> <p> The correspondence table between SAUs and FUAs/cities is available in <a href=https://webfs-cfe.oecd.org/files/.Stat/cities_local_areas/fua_cities_sau_mapping.parquet>parquet </a> and <a href=https://webfs-cfe.oecd.org/files/.Stat/cities_local_areas/fua_cities_sau_mapping.csv>csv</a> format. </p> The definition identifies 1 272 FUAs and 1 269 cities in all OECD member countries except Costa Rica and three accession countries.</p> <h3>Cite this dataset</h3> <p>OECD Regions, cities and local areas database (<a href="http://data-explorer.oecd.org/s/1dj">Cooling and heating degree days - Cities and FUAs</a>), <a href=http://oe.cd/geostats>http://oe.cd/geostats</a></p> <h3>Further information</h3> <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 align="justify">For questions and/or comments, please email <a href="mailto:CitiesStat@oecd.org">CitiesStat@oecd.org</a>