Armenia vs Nantes: Cooling and heating degree days - Cities and FUAs
Cooling and heating degree days - Cities and FUAs over time
- Armenia
- Nantes
How they compare
Nantes currently reports 1,385 Degree days against 162.92 Degree days in Armenia, a difference of 1,222 Degree days.
That makes Nantes's figure about 8.5 times Armenia's.
Across all 76 years both countries report, Nantes has been ahead every year.
Armenia ranks 2nd and Nantes ranks 2nd of 2 countries.
Nantes has averaged higher in every one of the 8 decades both report.
Head to head by decade
| Decade | Armenia | Nantes | Difference | Ahead |
|---|---|---|---|---|
| 1950s | 273.97 Degree days | 1,664 Degree days | 1,390 Degree days | Nantes |
| 1960s | 290.66 Degree days | 1,701 Degree days | 1,411 Degree days | Nantes |
| 1970s | 263.37 Degree days | 1,694 Degree days | 1,430 Degree days | Nantes |
| 1980s | 232.4 Degree days | 1,639 Degree days | 1,406 Degree days | Nantes |
| 1990s | 208.69 Degree days | 1,506 Degree days | 1,297 Degree days | Nantes |
| 2000s | 226.89 Degree days | 1,484 Degree days | 1,257 Degree days | Nantes |
| 2010s | 196.9 Degree days | 1,432 Degree days | 1,235 Degree days | Nantes |
| 2020s | 230.27 Degree days | 1,317 Degree days | 1,086 Degree days | Nantes |
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 Nantes?
- Nantes, at 1,385 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 Nantes?
- 1,222 Degree days, with Nantes ahead.
- How many years of comparable data are there for Armenia and Nantes?
- 76 years are reported by both, from 1950 to 2025.
- How do Armenia and Nantes rank globally for cooling and heating degree days - cities and fuas?
- Armenia ranks 2nd and Nantes ranks 2nd 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
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. Data sources and methodology The indicators use 0.1-degree resolution grids from the ERA5-Land dataset. 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. 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. Defining FUAs and cities The OECD, in cooperation with the EU, has developed a harmonised definition of functional urban areas (FUAs) to capture the economic and functional reach of cities based on daily commuting patterns (OECD, 2012). FUAs consist of: A city – defined by urban centres in the degree of urbanisation, adapted to the closest local administrative units to define a city. A commuting zone – including all local areas where at least 15% of employed residents work in the city. The delineation process includes: Assigning municipalities surrounded by a single FUA to that FUA. Excluding non-contiguous municipalities. The correspondence table between SAUs and FUAs/cities is available in parquet and csv format. The definition identifies 1 272 FUAs and 1 269 cities in all OECD member countries except Costa Rica and three accession countries. Cite this dataset OECD Regions, cities and local areas database (Cooling and heating degree days - Cities and FUAs), http://oe.cd/geostats Further information OECD Local Data Portal OECD Regions and Cities at a Glance For questions and/or comments, please email CitiesStat@oecd.org