Cooling and heating degree days - Cities and FUAs (heating Cities) in Köln
Köln: Cooling and heating degree days - Cities and FUAs (heating Cities) was 1,760 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in Köln, 1950–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degree days.
Analysis
In 2025, cooling and heating degree days - cities and fuas in Köln stood at 1,760 Degree days.
That represents a change of down 3.9% on the previous year and down 9.3% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in Köln peaked at 2,827 Degree days in 1963 and was at its lowest, 1,685 Degree days, in 2014.
Köln ranks 519th of 1314 regions on this measure, in the middle of the range.
The long-run direction has been consistently falling across the 76 years of available data.
Cooling and heating degree days - Cities and FUAs (heating Cities) in Köln, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 2,408 Degree days | — |
| 1951 | 2,232 Degree days | -7.3% |
| 1952 | 2,533 Degree days | +13.5% |
| 1953 | 2,209 Degree days | -12.8% |
| 1954 | 2,439 Degree days | +10.4% |
| 1955 | 2,677 Degree days | +9.8% |
| 1956 | 2,807 Degree days | +4.8% |
| 1957 | 2,169 Degree days | -22.7% |
| 1958 | 2,360 Degree days | +8.8% |
| 1959 | 2,088 Degree days | -11.5% |
| 1960 | 2,158 Degree days | +3.3% |
| 1961 | 2,065 Degree days | -4.3% |
| 1962 | 2,720 Degree days | +31.7% |
| 1963 | 2,827 Degree days | +3.9% |
| 1964 | 2,423 Degree days | -14.3% |
| 1965 | 2,459 Degree days | +1.5% |
| 1966 | 2,236 Degree days | -9.1% |
| 1967 | 2,214 Degree days | -1.0% |
| 1968 | 2,419 Degree days | +9.3% |
| 1969 | 2,633 Degree days | +8.8% |
| 1970 | 2,505 Degree days | -4.9% |
| 1971 | 2,298 Degree days | -8.3% |
| 1972 | 2,406 Degree days | +4.7% |
| 1973 | 2,464 Degree days | +2.4% |
| 1974 | 2,137 Degree days | -13.3% |
| 1975 | 2,254 Degree days | +5.4% |
| 1976 | 2,353 Degree days | +4.4% |
| 1977 | 2,168 Degree days | -7.9% |
| 1978 | 2,450 Degree days | +13.0% |
| 1979 | 2,605 Degree days | +6.4% |
| 1980 | 2,460 Degree days | -5.6% |
| 1981 | 2,392 Degree days | -2.7% |
| 1982 | 2,220 Degree days | -7.2% |
| 1983 | 2,249 Degree days | +1.3% |
| 1984 | 2,375 Degree days | +5.6% |
| 1985 | 2,692 Degree days | +13.3% |
| 1986 | 2,497 Degree days | -7.2% |
| 1987 | 2,596 Degree days | +3.9% |
| 1988 | 2,002 Degree days | -22.9% |
| 1989 | 1,960 Degree days | -2.1% |
| 1990 | 1,918 Degree days | -2.2% |
| 1991 | 2,318 Degree days | +20.9% |
| 1992 | 2,150 Degree days | -7.3% |
| 1993 | 2,259 Degree days | +5.1% |
| 1994 | 1,984 Degree days | -12.2% |
| 1995 | 2,157 Degree days | +8.7% |
| 1996 | 2,668 Degree days | +23.7% |
| 1997 | 2,248 Degree days | -15.7% |
| 1998 | 2,148 Degree days | -4.4% |
| 1999 | 2,023 Degree days | -5.8% |
| 2000 | 1,886 Degree days | -6.8% |
| 2001 | 2,148 Degree days | +13.9% |
| 2002 | 1,938 Degree days | -9.8% |
| 2003 | 2,170 Degree days | +12.0% |
| 2004 | 2,200 Degree days | +1.4% |
| 2005 | 2,097 Degree days | -4.7% |
| 2006 | 2,062 Degree days | -1.7% |
| 2007 | 1,871 Degree days | -9.3% |
| 2008 | 2,110 Degree days | +12.8% |
| 2009 | 2,125 Degree days | +0.7% |
| 2010 | 2,611 Degree days | +22.9% |
| 2011 | 1,879 Degree days | -28.1% |
| 2012 | 2,142 Degree days | +14.0% |
| 2013 | 2,326 Degree days | +8.6% |
| 2014 | 1,685 Degree days | -27.5% |
| 2015 | 1,940 Degree days | +15.1% |
| 2016 | 2,081 Degree days | +7.3% |
| 2017 | 1,974 Degree days | -5.2% |
| 2018 | 1,890 Degree days | -4.2% |
| 2019 | 1,892 Degree days | +0.1% |
| 2020 | 1,717 Degree days | -9.3% |
| 2021 | 2,129 Degree days | +24.0% |
| 2022 | 1,784 Degree days | -16.2% |
| 2023 | 1,879 Degree days | +5.3% |
| 2024 | 1,832 Degree days | -2.5% |
| 2025 | 1,760 Degree days | -3.9% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 2,392 Degree days | 2,088 Degree days | 2,807 Degree days | 10 |
| 1960s | 2,415 Degree days | 2,065 Degree days | 2,827 Degree days | 10 |
| 1970s | 2,364 Degree days | 2,137 Degree days | 2,605 Degree days | 10 |
| 1980s | 2,344 Degree days | 1,960 Degree days | 2,692 Degree days | 10 |
| 1990s | 2,187 Degree days | 1,918 Degree days | 2,668 Degree days | 10 |
| 2000s | 2,061 Degree days | 1,871 Degree days | 2,200 Degree days | 10 |
| 2010s | 2,042 Degree days | 1,685 Degree days | 2,611 Degree days | 10 |
| 2020s | 1,850 Degree days | 1,717 Degree days | 2,129 Degree days | 6 |
More reference data data for Köln
- Cooling and heating degree days by NUTS 2 regions - annual data 6.98 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree 40.43 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -9.52 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -442.43 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -19.35 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -172.07 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -3.92 % change on previous year (2025)
- Cooling and heating degree days by NUTS 2 regions - monthly data -6.71 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -35.98 % change on previous year (2025)
- Precipitation - Cities and FUAs — Change in extreme precipitation 3.4 Days per year (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in Köln?
- Cooling and heating degree days - cities and fuas in Köln was 1,760 Degree days in 2025, according to Organisation for Economic Co-operation and Development.
- What is the highest cooling and heating degree days - cities and fuas recorded in Köln?
- The highest recorded value was 2,827 Degree days in 1963.
- What is the lowest cooling and heating degree days - cities and fuas recorded in Köln?
- The lowest recorded value was 1,685 Degree days in 2014.
- How does Köln rank for cooling and heating degree days - cities and fuas?
- Köln ranks 519th out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in Köln?
- Over the last ten years it is down 9.3%. The long-run trend across the full record is falling.
- Where does this Köln data come from?
- The figures come from Organisation for Economic Co-operation and Development, published as part of Cooling and heating degree days - Cities and FUAs. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 76 observations, free to reuse under OECD Terms and Conditions (attribution required).
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