Cooling and heating degree days - Cities and FUAs in Leuven
Leuven: Cooling and heating degree days - Cities and FUAs was 1,639 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in Leuven, 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 Leuven stood at 1,639 Degree days.
That represents a change of down 7.4% on the previous year and down 11.6% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in Leuven peaked at 2,685 Degree days in 1963 and was at its lowest, 1,614 Degree days, in 2014.
That places Leuven 602nd out of 1314 regions with data for 2025, putting it 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 in Leuven, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 2,323 Degree days | — |
| 1951 | 2,171 Degree days | -6.5% |
| 1952 | 2,383 Degree days | +9.7% |
| 1953 | 2,157 Degree days | -9.5% |
| 1954 | 2,310 Degree days | +7.1% |
| 1955 | 2,519 Degree days | +9.0% |
| 1956 | 2,621 Degree days | +4.0% |
| 1957 | 2,060 Degree days | -21.4% |
| 1958 | 2,234 Degree days | +8.5% |
| 1959 | 2,013 Degree days | -9.9% |
| 1960 | 2,059 Degree days | +2.3% |
| 1961 | 1,962 Degree days | -4.7% |
| 1962 | 2,584 Degree days | +31.7% |
| 1963 | 2,685 Degree days | +3.9% |
| 1964 | 2,317 Degree days | -13.7% |
| 1965 | 2,345 Degree days | +1.2% |
| 1966 | 2,149 Degree days | -8.4% |
| 1967 | 2,147 Degree days | -0.1% |
| 1968 | 2,333 Degree days | +8.7% |
| 1969 | 2,464 Degree days | +5.6% |
| 1970 | 2,313 Degree days | -6.1% |
| 1971 | 2,194 Degree days | -5.2% |
| 1972 | 2,268 Degree days | +3.4% |
| 1973 | 2,332 Degree days | +2.8% |
| 1974 | 2,045 Degree days | -12.3% |
| 1975 | 2,203 Degree days | +7.7% |
| 1976 | 2,221 Degree days | +0.8% |
| 1977 | 2,084 Degree days | -6.2% |
| 1978 | 2,313 Degree days | +11.0% |
| 1979 | 2,498 Degree days | +8.0% |
| 1980 | 2,338 Degree days | -6.4% |
| 1981 | 2,234 Degree days | -4.5% |
| 1982 | 2,114 Degree days | -5.4% |
| 1983 | 2,117 Degree days | +0.1% |
| 1984 | 2,193 Degree days | +3.6% |
| 1985 | 2,544 Degree days | +16.0% |
| 1986 | 2,378 Degree days | -6.5% |
| 1987 | 2,465 Degree days | +3.7% |
| 1988 | 1,903 Degree days | -22.8% |
| 1989 | 1,896 Degree days | -0.3% |
| 1990 | 1,821 Degree days | -4.0% |
| 1991 | 2,204 Degree days | +21.1% |
| 1992 | 2,058 Degree days | -6.6% |
| 1993 | 2,126 Degree days | +3.3% |
| 1994 | 1,887 Degree days | -11.2% |
| 1995 | 2,032 Degree days | +7.7% |
| 1996 | 2,537 Degree days | +24.9% |
| 1997 | 2,081 Degree days | -18.0% |
| 1998 | 2,021 Degree days | -2.9% |
| 1999 | 1,928 Degree days | -4.6% |
| 2000 | 1,829 Degree days | -5.1% |
| 2001 | 2,070 Degree days | +13.2% |
| 2002 | 1,820 Degree days | -12.1% |
| 2003 | 2,073 Degree days | +13.9% |
| 2004 | 2,068 Degree days | -0.2% |
| 2005 | 1,990 Degree days | -3.8% |
| 2006 | 1,969 Degree days | -1.1% |
| 2007 | 1,766 Degree days | -10.3% |
| 2008 | 2,026 Degree days | +14.7% |
| 2009 | 2,030 Degree days | +0.2% |
| 2010 | 2,503 Degree days | +23.3% |
| 2011 | 1,762 Degree days | -29.6% |
| 2012 | 2,057 Degree days | +16.7% |
| 2013 | 2,277 Degree days | +10.7% |
| 2014 | 1,614 Degree days | -29.1% |
| 2015 | 1,854 Degree days | +14.9% |
| 2016 | 1,987 Degree days | +7.1% |
| 2017 | 1,846 Degree days | -7.1% |
| 2018 | 1,844 Degree days | -0.1% |
| 2019 | 1,808 Degree days | -2.0% |
| 2020 | 1,630 Degree days | -9.9% |
| 2021 | 2,027 Degree days | +24.4% |
| 2022 | 1,693 Degree days | -16.5% |
| 2023 | 1,797 Degree days | +6.2% |
| 2024 | 1,770 Degree days | -1.5% |
| 2025 | 1,639 Degree days | -7.4% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 2,279 Degree days | 2,013 Degree days | 2,621 Degree days | 10 |
| 1960s | 2,305 Degree days | 1,962 Degree days | 2,685 Degree days | 10 |
| 1970s | 2,247 Degree days | 2,045 Degree days | 2,498 Degree days | 10 |
| 1980s | 2,218 Degree days | 1,896 Degree days | 2,544 Degree days | 10 |
| 1990s | 2,070 Degree days | 1,821 Degree days | 2,537 Degree days | 10 |
| 2000s | 1,964 Degree days | 1,766 Degree days | 2,073 Degree days | 10 |
| 2010s | 1,955 Degree days | 1,614 Degree days | 2,503 Degree days | 10 |
| 2020s | 1,759 Degree days | 1,630 Degree days | 2,027 Degree days | 6 |
More reference data data for Leuven
- Cooling and heating degree days - Cities and FUAs — Cooling degree 34.04 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -6.62 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -450.34 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -41.16 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -7.42 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -164.91 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -33.08 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 4.4 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation 2.81 Days per year (2024)
- Dependency ratio - Cities and FUAs 24.5 Percentage of population aged 15-64 years (2025)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in Leuven?
- Cooling and heating degree days - cities and fuas in Leuven was 1,639 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 Leuven?
- The highest recorded value was 2,685 Degree days in 1963.
- What is the lowest cooling and heating degree days - cities and fuas recorded in Leuven?
- The lowest recorded value was 1,614 Degree days in 2014.
- How does Leuven rank for cooling and heating degree days - cities and fuas?
- Leuven ranks 602nd out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in Leuven?
- Over the last ten years it is down 11.6%. The long-run trend across the full record is falling.
- Where does this Leuven 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