Cooling and heating degree days - Cities and FUAs (heating Cities) in Tulcea
Tulcea: Cooling and heating degree days - Cities and FUAs (heating Cities) was 1,431 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in Tulcea, 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 Tulcea is 1,431 Degree days, measured in 2025. That is the lowest value across all 76 years on record.
Compared with earlier readings it is down 19.8% on the previous year and down 26.2% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in Tulcea peaked at 2,743 Degree days in 1954 and was at its lowest, 1,431 Degree days, in 2025.
That places Tulcea 716th 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 (heating Cities) in Tulcea, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 2,061 Degree days | — |
| 1951 | 1,943 Degree days | -5.7% |
| 1952 | 2,089 Degree days | +7.5% |
| 1953 | 2,454 Degree days | +17.5% |
| 1954 | 2,743 Degree days | +11.8% |
| 1955 | 2,110 Degree days | -23.1% |
| 1956 | 2,708 Degree days | +28.3% |
| 1957 | 2,279 Degree days | -15.8% |
| 1958 | 2,106 Degree days | -7.6% |
| 1959 | 2,291 Degree days | +8.8% |
| 1960 | 1,888 Degree days | -17.6% |
| 1961 | 2,037 Degree days | +7.9% |
| 1962 | 2,178 Degree days | +6.9% |
| 1963 | 2,543 Degree days | +16.7% |
| 1964 | 2,289 Degree days | -10.0% |
| 1965 | 2,380 Degree days | +4.0% |
| 1966 | 1,868 Degree days | -21.5% |
| 1967 | 2,348 Degree days | +25.7% |
| 1968 | 2,267 Degree days | -3.5% |
| 1969 | 2,582 Degree days | +13.9% |
| 1970 | 1,994 Degree days | -22.8% |
| 1971 | 2,101 Degree days | +5.3% |
| 1972 | 2,258 Degree days | +7.5% |
| 1973 | 2,401 Degree days | +6.4% |
| 1974 | 2,202 Degree days | -8.3% |
| 1975 | 2,080 Degree days | -5.6% |
| 1976 | 2,345 Degree days | +12.7% |
| 1977 | 2,080 Degree days | -11.3% |
| 1978 | 2,242 Degree days | +7.8% |
| 1979 | 2,074 Degree days | -7.5% |
| 1980 | 2,398 Degree days | +15.6% |
| 1981 | 2,155 Degree days | -10.1% |
| 1982 | 2,199 Degree days | +2.0% |
| 1983 | 2,138 Degree days | -2.8% |
| 1984 | 2,223 Degree days | +4.0% |
| 1985 | 2,680 Degree days | +20.5% |
| 1986 | 2,321 Degree days | -13.4% |
| 1987 | 2,604 Degree days | +12.2% |
| 1988 | 2,332 Degree days | -10.5% |
| 1989 | 1,859 Degree days | -20.3% |
| 1990 | 1,773 Degree days | -4.6% |
| 1991 | 2,327 Degree days | +31.2% |
| 1992 | 2,216 Degree days | -4.7% |
| 1993 | 2,364 Degree days | +6.7% |
| 1994 | 1,968 Degree days | -16.8% |
| 1995 | 2,250 Degree days | +14.3% |
| 1996 | 2,438 Degree days | +8.4% |
| 1997 | 2,441 Degree days | +0.1% |
| 1998 | 2,174 Degree days | -10.9% |
| 1999 | 1,958 Degree days | -10.0% |
| 2000 | 1,983 Degree days | +1.3% |
| 2001 | 2,122 Degree days | +7.0% |
| 2002 | 1,987 Degree days | -6.4% |
| 2003 | 2,460 Degree days | +23.8% |
| 2004 | 2,006 Degree days | -18.5% |
| 2005 | 2,105 Degree days | +5.0% |
| 2006 | 2,135 Degree days | +1.4% |
| 2007 | 1,812 Degree days | -15.1% |
| 2008 | 1,810 Degree days | -0.1% |
| 2009 | 1,882 Degree days | +4.0% |
| 2010 | 2,043 Degree days | +8.5% |
| 2011 | 2,309 Degree days | +13.0% |
| 2012 | 2,159 Degree days | -6.5% |
| 2013 | 1,874 Degree days | -13.2% |
| 2014 | 1,916 Degree days | +2.3% |
| 2015 | 1,939 Degree days | +1.2% |
| 2016 | 2,027 Degree days | +4.5% |
| 2017 | 2,050 Degree days | +1.2% |
| 2018 | 2,097 Degree days | +2.3% |
| 2019 | 1,697 Degree days | -19.1% |
| 2020 | 1,668 Degree days | -1.7% |
| 2021 | 2,003 Degree days | +20.1% |
| 2022 | 1,843 Degree days | -7.9% |
| 2023 | 1,765 Degree days | -4.2% |
| 2024 | 1,784 Degree days | +1.1% |
| 2025 | 1,431 Degree days | -19.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 2,278 Degree days | 1,943 Degree days | 2,743 Degree days | 10 |
| 1960s | 2,238 Degree days | 1,868 Degree days | 2,582 Degree days | 10 |
| 1970s | 2,178 Degree days | 1,994 Degree days | 2,401 Degree days | 10 |
| 1980s | 2,291 Degree days | 1,859 Degree days | 2,680 Degree days | 10 |
| 1990s | 2,191 Degree days | 1,773 Degree days | 2,441 Degree days | 10 |
| 2000s | 2,030 Degree days | 1,810 Degree days | 2,460 Degree days | 10 |
| 2010s | 2,011 Degree days | 1,697 Degree days | 2,309 Degree days | 10 |
| 2020s | 1,749 Degree days | 1,431 Degree days | 2,003 Degree days | 6 |
More reference data data for Tulcea
- Cooling and heating degree days by NUTS 2 regions - annual data 5.68 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree 224.44 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling 29.7 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -727.62 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -94.32 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -85.38 % change on previous year (2025)
- Cooling and heating degree days by NUTS 2 regions - monthly data 2.51 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -19.79 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -43.59 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 2.86 Days per year (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in Tulcea?
- Cooling and heating degree days - cities and fuas in Tulcea was 1,431 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 Tulcea?
- The highest recorded value was 2,743 Degree days in 1954.
- What is the lowest cooling and heating degree days - cities and fuas recorded in Tulcea?
- The lowest recorded value was 1,431 Degree days in 2025.
- How does Tulcea rank for cooling and heating degree days - cities and fuas?
- Tulcea ranks 716th out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in Tulcea?
- Over the last ten years it is down 26.2%. The long-run trend across the full record is falling.
- Where does this Tulcea 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