Cooling and heating degree days - Cities and FUAs in New Haven
New Haven: Cooling and heating degree days - Cities and FUAs was 2,404 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in New Haven, 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 New Haven stood at 2,404 Degree days.
That represents a change of up 10.7% on the previous year and down 2.6% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in New Haven peaked at 2,790 Degree days in 1969 and was at its lowest, 1,994 Degree days, in 2012.
That places New Haven 203rd out of 1314 regions with data for 2025, putting it in the top quarter.
The long-run direction has been consistently falling across the 76 years of available data.
Cooling and heating degree days - Cities and FUAs in New Haven, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 2,486 Degree days | — |
| 1951 | 2,337 Degree days | -6.0% |
| 1952 | 2,400 Degree days | +2.7% |
| 1953 | 2,111 Degree days | -12.0% |
| 1954 | 2,433 Degree days | +15.3% |
| 1955 | 2,582 Degree days | +6.1% |
| 1956 | 2,620 Degree days | +1.5% |
| 1957 | 2,354 Degree days | -10.1% |
| 1958 | 2,765 Degree days | +17.5% |
| 1959 | 2,508 Degree days | -9.3% |
| 1960 | 2,629 Degree days | +4.8% |
| 1961 | 2,687 Degree days | +2.2% |
| 1962 | 2,734 Degree days | +1.7% |
| 1963 | 2,711 Degree days | -0.8% |
| 1964 | 2,571 Degree days | -5.2% |
| 1965 | 2,727 Degree days | +6.1% |
| 1966 | 2,622 Degree days | -3.9% |
| 1967 | 2,782 Degree days | +6.1% |
| 1968 | 2,715 Degree days | -2.4% |
| 1969 | 2,790 Degree days | +2.8% |
| 1970 | 2,781 Degree days | -0.3% |
| 1971 | 2,674 Degree days | -3.8% |
| 1972 | 2,718 Degree days | +1.6% |
| 1973 | 2,234 Degree days | -17.8% |
| 1974 | 2,425 Degree days | +8.6% |
| 1975 | 2,294 Degree days | -5.4% |
| 1976 | 2,611 Degree days | +13.8% |
| 1977 | 2,551 Degree days | -2.3% |
| 1978 | 2,733 Degree days | +7.1% |
| 1979 | 2,434 Degree days | -10.9% |
| 1980 | 2,689 Degree days | +10.5% |
| 1981 | 2,573 Degree days | -4.3% |
| 1982 | 2,502 Degree days | -2.8% |
| 1983 | 2,417 Degree days | -3.4% |
| 1984 | 2,423 Degree days | +0.2% |
| 1985 | 2,448 Degree days | +1.0% |
| 1986 | 2,441 Degree days | -0.3% |
| 1987 | 2,493 Degree days | +2.1% |
| 1988 | 2,586 Degree days | +3.7% |
| 1989 | 2,620 Degree days | +1.3% |
| 1990 | 2,058 Degree days | -21.5% |
| 1991 | 2,141 Degree days | +4.0% |
| 1992 | 2,540 Degree days | +18.6% |
| 1993 | 2,511 Degree days | -1.2% |
| 1994 | 2,535 Degree days | +1.0% |
| 1995 | 2,447 Degree days | -3.5% |
| 1996 | 2,606 Degree days | +6.5% |
| 1997 | 2,472 Degree days | -5.1% |
| 1998 | 2,054 Degree days | -16.9% |
| 1999 | 2,241 Degree days | +9.1% |
| 2000 | 2,538 Degree days | +13.3% |
| 2001 | 2,288 Degree days | -9.9% |
| 2002 | 2,286 Degree days | -0.1% |
| 2003 | 2,685 Degree days | +17.5% |
| 2004 | 2,544 Degree days | -5.2% |
| 2005 | 2,549 Degree days | +0.2% |
| 2006 | 2,093 Degree days | -17.9% |
| 2007 | 2,439 Degree days | +16.5% |
| 2008 | 2,341 Degree days | -4.0% |
| 2009 | 2,473 Degree days | +5.7% |
| 2010 | 2,277 Degree days | -8.0% |
| 2011 | 2,273 Degree days | -0.1% |
| 2012 | 1,994 Degree days | -12.3% |
| 2013 | 2,472 Degree days | +24.0% |
| 2014 | 2,595 Degree days | +5.0% |
| 2015 | 2,468 Degree days | -4.9% |
| 2016 | 2,211 Degree days | -10.4% |
| 2017 | 2,263 Degree days | +2.3% |
| 2018 | 2,413 Degree days | +6.6% |
| 2019 | 2,392 Degree days | -0.9% |
| 2020 | 2,093 Degree days | -12.5% |
| 2021 | 2,155 Degree days | +3.0% |
| 2022 | 2,249 Degree days | +4.3% |
| 2023 | 2,059 Degree days | -8.4% |
| 2024 | 2,171 Degree days | +5.4% |
| 2025 | 2,404 Degree days | +10.7% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 2,460 Degree days | 2,111 Degree days | 2,765 Degree days | 10 |
| 1960s | 2,697 Degree days | 2,571 Degree days | 2,790 Degree days | 10 |
| 1970s | 2,546 Degree days | 2,234 Degree days | 2,781 Degree days | 10 |
| 1980s | 2,519 Degree days | 2,417 Degree days | 2,689 Degree days | 10 |
| 1990s | 2,361 Degree days | 2,054 Degree days | 2,606 Degree days | 10 |
| 2000s | 2,424 Degree days | 2,093 Degree days | 2,685 Degree days | 10 |
| 2010s | 2,336 Degree days | 1,994 Degree days | 2,595 Degree days | 10 |
| 2020s | 2,188 Degree days | 2,059 Degree days | 2,404 Degree days | 6 |
More reference data data for New Haven
- Cooling and heating degree days - Cities and FUAs — Cooling degree 121.12 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -48.97 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -17.23 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating 93.1 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate 10.71 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -223.19 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -42.28 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 14.36 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation -1.78 Days per year (2024)
- Dependency ratio - Cities and FUAs 30.7 Percentage of population aged 15-64 years (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in New Haven?
- Cooling and heating degree days - cities and fuas in New Haven was 2,404 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 New Haven?
- The highest recorded value was 2,790 Degree days in 1969.
- What is the lowest cooling and heating degree days - cities and fuas recorded in New Haven?
- The lowest recorded value was 1,994 Degree days in 2012.
- How does New Haven rank for cooling and heating degree days - cities and fuas?
- New Haven ranks 203rd out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in New Haven?
- Over the last ten years it is down 2.6%. The long-run trend across the full record is falling.
- Where does this New Haven 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