Cooling and heating degree days - Cities and FUAs in La Seyne-sur-Mer
La Seyne-sur-Mer: Cooling and heating degree days - Cities and FUAs was 714.93 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in La Seyne-sur-Mer, 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 La Seyne-sur-Mer stood at 714.93 Degree days. That is the lowest value across all 76 years on record.
That represents a change of down 14.7% on the previous year and down 22.3% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in La Seyne-sur-Mer peaked at 1,505 Degree days in 1956 and was at its lowest, 714.93 Degree days, in 2025.
La Seyne-sur-Mer ranks 986th of 1314 regions on this measure, in the bottom 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 La Seyne-sur-Mer, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 1,197 Degree days | — |
| 1951 | 1,138 Degree days | -4.9% |
| 1952 | 1,241 Degree days | +9.0% |
| 1953 | 1,204 Degree days | -3.0% |
| 1954 | 1,230 Degree days | +2.1% |
| 1955 | 1,020 Degree days | -17.1% |
| 1956 | 1,505 Degree days | +47.5% |
| 1957 | 1,101 Degree days | -26.9% |
| 1958 | 1,127 Degree days | +2.4% |
| 1959 | 1,058 Degree days | -6.1% |
| 1960 | 1,177 Degree days | +11.2% |
| 1961 | 945.06 Degree days | -19.7% |
| 1962 | 1,303 Degree days | +37.9% |
| 1963 | 1,314 Degree days | +0.8% |
| 1964 | 1,163 Degree days | -11.5% |
| 1965 | 1,172 Degree days | +0.8% |
| 1966 | 1,128 Degree days | -3.8% |
| 1967 | 1,084 Degree days | -3.9% |
| 1968 | 1,104 Degree days | +1.8% |
| 1969 | 1,344 Degree days | +21.8% |
| 1970 | 1,182 Degree days | -12.1% |
| 1971 | 1,197 Degree days | +1.3% |
| 1972 | 1,082 Degree days | -9.6% |
| 1973 | 1,281 Degree days | +18.4% |
| 1974 | 1,212 Degree days | -5.4% |
| 1975 | 1,196 Degree days | -1.3% |
| 1976 | 1,236 Degree days | +3.3% |
| 1977 | 1,033 Degree days | -16.4% |
| 1978 | 1,185 Degree days | +14.8% |
| 1979 | 1,201 Degree days | +1.4% |
| 1980 | 1,302 Degree days | +8.3% |
| 1981 | 1,198 Degree days | -8.0% |
| 1982 | 1,066 Degree days | -11.0% |
| 1983 | 1,135 Degree days | +6.5% |
| 1984 | 1,246 Degree days | +9.9% |
| 1985 | 1,274 Degree days | +2.2% |
| 1986 | 1,193 Degree days | -6.4% |
| 1987 | 1,194 Degree days | +0.1% |
| 1988 | 1,065 Degree days | -10.9% |
| 1989 | 953.58 Degree days | -10.4% |
| 1990 | 969.85 Degree days | +1.7% |
| 1991 | 1,187 Degree days | +22.4% |
| 1992 | 1,001 Degree days | -15.6% |
| 1993 | 1,129 Degree days | +12.8% |
| 1994 | 926.59 Degree days | -18.0% |
| 1995 | 1,045 Degree days | +12.8% |
| 1996 | 1,104 Degree days | +5.6% |
| 1997 | 911.05 Degree days | -17.5% |
| 1998 | 1,089 Degree days | +19.5% |
| 1999 | 1,115 Degree days | +2.4% |
| 2000 | 990.74 Degree days | -11.1% |
| 2001 | 999.59 Degree days | +0.9% |
| 2002 | 879.35 Degree days | -12.0% |
| 2003 | 1,114 Degree days | +26.7% |
| 2004 | 1,122 Degree days | +0.7% |
| 2005 | 1,228 Degree days | +9.4% |
| 2006 | 966.71 Degree days | -21.3% |
| 2007 | 937.06 Degree days | -3.1% |
| 2008 | 1,037 Degree days | +10.7% |
| 2009 | 1,065 Degree days | +2.7% |
| 2010 | 1,313 Degree days | +23.2% |
| 2011 | 954.29 Degree days | -27.3% |
| 2012 | 1,097 Degree days | +14.9% |
| 2013 | 1,161 Degree days | +5.9% |
| 2014 | 804.98 Degree days | -30.7% |
| 2015 | 920.12 Degree days | +14.3% |
| 2016 | 876.74 Degree days | -4.7% |
| 2017 | 966.76 Degree days | +10.3% |
| 2018 | 886.74 Degree days | -8.3% |
| 2019 | 924.42 Degree days | +4.2% |
| 2020 | 773.84 Degree days | -16.3% |
| 2021 | 937.55 Degree days | +21.2% |
| 2022 | 796.94 Degree days | -15.0% |
| 2023 | 929.14 Degree days | +16.6% |
| 2024 | 838.11 Degree days | -9.8% |
| 2025 | 714.93 Degree days | -14.7% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 1,182 Degree days | 1,020 Degree days | 1,505 Degree days | 10 |
| 1960s | 1,173 Degree days | 945.06 Degree days | 1,344 Degree days | 10 |
| 1970s | 1,181 Degree days | 1,033 Degree days | 1,281 Degree days | 10 |
| 1980s | 1,163 Degree days | 953.58 Degree days | 1,302 Degree days | 10 |
| 1990s | 1,048 Degree days | 911.05 Degree days | 1,187 Degree days | 10 |
| 2000s | 1,034 Degree days | 879.35 Degree days | 1,228 Degree days | 10 |
| 2010s | 990.46 Degree days | 804.98 Degree days | 1,313 Degree days | 10 |
| 2020s | 831.75 Degree days | 714.93 Degree days | 937.55 Degree days | 6 |
More reference data data for La Seyne-sur-Mer
- Cooling and heating degree days - Cities and FUAs — Cooling degree 252.98 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling 104.81 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -366.94 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -50.53 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -14.7 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -7.31 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -3.16 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 9 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation 1.33 Days per year (2024)
- Dependency ratio - Cities and FUAs 56.3 Percentage of population aged 15-64 years (2022)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in La Seyne-sur-Mer?
- Cooling and heating degree days - cities and fuas in La Seyne-sur-Mer was 714.93 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 La Seyne-sur-Mer?
- The highest recorded value was 1,505 Degree days in 1956.
- What is the lowest cooling and heating degree days - cities and fuas recorded in La Seyne-sur-Mer?
- The lowest recorded value was 714.93 Degree days in 2025.
- How does La Seyne-sur-Mer rank for cooling and heating degree days - cities and fuas?
- La Seyne-sur-Mer ranks 986th out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in La Seyne-sur-Mer?
- Over the last ten years it is down 22.3%. The long-run trend across the full record is falling.
- Where does this La Seyne-sur-Mer 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