Cooling and heating degree days - Cities and FUAs in Jefferson (KY)
Jefferson (KY): Cooling and heating degree days - Cities and FUAs was 1,785 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in Jefferson (KY), 1950–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degree days.
Analysis
The most recent figure for cooling and heating degree days - cities and fuas in Jefferson (KY) is 1,785 Degree days, measured in 2025.
That represents a change of up 14.8% on the previous year and up 1.9% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in Jefferson (KY) peaked at 2,296 Degree days in 1978 and was at its lowest, 1,490 Degree days, in 2012.
That places Jefferson (KY) 506th 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 Jefferson (KY), year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 1,936 Degree days | — |
| 1951 | 1,991 Degree days | +2.8% |
| 1952 | 1,712 Degree days | -14.0% |
| 1953 | 1,644 Degree days | -4.0% |
| 1954 | 1,812 Degree days | +10.2% |
| 1955 | 1,909 Degree days | +5.4% |
| 1956 | 1,799 Degree days | -5.8% |
| 1957 | 1,796 Degree days | -0.2% |
| 1958 | 2,294 Degree days | +27.8% |
| 1959 | 1,893 Degree days | -17.5% |
| 1960 | 2,238 Degree days | +18.3% |
| 1961 | 1,982 Degree days | -11.5% |
| 1962 | 2,114 Degree days | +6.7% |
| 1963 | 2,166 Degree days | +2.5% |
| 1964 | 1,889 Degree days | -12.8% |
| 1965 | 1,879 Degree days | -0.5% |
| 1966 | 2,114 Degree days | +12.5% |
| 1967 | 1,907 Degree days | -9.8% |
| 1968 | 2,134 Degree days | +11.9% |
| 1969 | 2,270 Degree days | +6.3% |
| 1970 | 2,096 Degree days | -7.7% |
| 1971 | 1,888 Degree days | -9.9% |
| 1972 | 1,989 Degree days | +5.3% |
| 1973 | 1,705 Degree days | -14.2% |
| 1974 | 1,703 Degree days | -0.1% |
| 1975 | 1,795 Degree days | +5.4% |
| 1976 | 2,023 Degree days | +12.7% |
| 1977 | 2,123 Degree days | +5.0% |
| 1978 | 2,296 Degree days | +8.1% |
| 1979 | 2,154 Degree days | -6.2% |
| 1980 | 2,173 Degree days | +0.9% |
| 1981 | 2,013 Degree days | -7.4% |
| 1982 | 1,889 Degree days | -6.2% |
| 1983 | 2,011 Degree days | +6.5% |
| 1984 | 1,921 Degree days | -4.5% |
| 1985 | 1,981 Degree days | +3.1% |
| 1986 | 1,815 Degree days | -8.4% |
| 1987 | 1,774 Degree days | -2.3% |
| 1988 | 2,039 Degree days | +14.9% |
| 1989 | 2,077 Degree days | +1.9% |
| 1990 | 1,503 Degree days | -27.6% |
| 1991 | 1,675 Degree days | +11.5% |
| 1992 | 1,800 Degree days | +7.5% |
| 1993 | 1,990 Degree days | +10.6% |
| 1994 | 1,815 Degree days | -8.8% |
| 1995 | 1,941 Degree days | +7.0% |
| 1996 | 2,079 Degree days | +7.1% |
| 1997 | 1,945 Degree days | -6.4% |
| 1998 | 1,492 Degree days | -23.3% |
| 1999 | 1,651 Degree days | +10.7% |
| 2000 | 1,914 Degree days | +15.9% |
| 2001 | 1,733 Degree days | -9.4% |
| 2002 | 1,833 Degree days | +5.7% |
| 2003 | 1,892 Degree days | +3.2% |
| 2004 | 1,793 Degree days | -5.2% |
| 2005 | 1,807 Degree days | +0.7% |
| 2006 | 1,615 Degree days | -10.6% |
| 2007 | 1,751 Degree days | +8.4% |
| 2008 | 1,957 Degree days | +11.7% |
| 2009 | 1,831 Degree days | -6.4% |
| 2010 | 2,011 Degree days | +9.8% |
| 2011 | 1,700 Degree days | -15.4% |
| 2012 | 1,490 Degree days | -12.4% |
| 2013 | 1,989 Degree days | +33.5% |
| 2014 | 2,194 Degree days | +10.3% |
| 2015 | 1,751 Degree days | -20.2% |
| 2016 | 1,638 Degree days | -6.5% |
| 2017 | 1,518 Degree days | -7.3% |
| 2018 | 1,922 Degree days | +26.6% |
| 2019 | 1,748 Degree days | -9.0% |
| 2020 | 1,593 Degree days | -8.9% |
| 2021 | 1,662 Degree days | +4.4% |
| 2022 | 1,815 Degree days | +9.2% |
| 2023 | 1,496 Degree days | -17.5% |
| 2024 | 1,555 Degree days | +3.9% |
| 2025 | 1,785 Degree days | +14.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 1,878 Degree days | 1,644 Degree days | 2,294 Degree days | 10 |
| 1960s | 2,069 Degree days | 1,879 Degree days | 2,270 Degree days | 10 |
| 1970s | 1,977 Degree days | 1,703 Degree days | 2,296 Degree days | 10 |
| 1980s | 1,969 Degree days | 1,774 Degree days | 2,173 Degree days | 10 |
| 1990s | 1,789 Degree days | 1,492 Degree days | 2,079 Degree days | 10 |
| 2000s | 1,813 Degree days | 1,615 Degree days | 1,957 Degree days | 10 |
| 2010s | 1,796 Degree days | 1,490 Degree days | 2,194 Degree days | 10 |
| 2020s | 1,651 Degree days | 1,496 Degree days | 1,815 Degree days | 6 |
More reference data data for Jefferson (KY)
- Cooling and heating degree days - Cities and FUAs — Cooling degree 324.8 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -65.91 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -66.48 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating 77.58 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate 14.8 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -246.54 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -25.45 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 16.2 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation 2.49 Days per year (2024)
- Dependency ratio - Cities and FUAs 27.8 Percentage of population aged 15-64 years (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in Jefferson (KY)?
- Cooling and heating degree days - cities and fuas in Jefferson (KY) was 1,785 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 Jefferson (KY)?
- The highest recorded value was 2,296 Degree days in 1978.
- What is the lowest cooling and heating degree days - cities and fuas recorded in Jefferson (KY)?
- The lowest recorded value was 1,490 Degree days in 2012.
- How does Jefferson (KY) rank for cooling and heating degree days - cities and fuas?
- Jefferson (KY) ranks 506th out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in Jefferson (KY)?
- Over the last ten years it is up 1.9%. The long-run trend across the full record is falling.
- Where does this Jefferson (KY) 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