Cooling and heating degree days - Cities and FUAs in Porto
Porto: Cooling and heating degree days - Cities and FUAs was 747.72 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in Porto, 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 Porto is 747.72 Degree days, measured in 2025.
The figure is up 0.9% on the previous year and down 5.8% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in Porto peaked at 1,444 Degree days in 1978 and was at its lowest, 667.33 Degree days, in 2022.
The long-run direction has been consistently falling across the 76 years of available data.
Cooling and heating degree days - Cities and FUAs in Porto, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 964.43 Degree days | — |
| 1951 | 1,093 Degree days | +13.3% |
| 1952 | 1,019 Degree days | -6.8% |
| 1953 | 980.68 Degree days | -3.8% |
| 1954 | 1,120 Degree days | +14.2% |
| 1955 | 803.63 Degree days | -28.3% |
| 1956 | 1,256 Degree days | +56.3% |
| 1957 | 1,019 Degree days | -18.9% |
| 1958 | 936.94 Degree days | -8.1% |
| 1959 | 880.4 Degree days | -6.0% |
| 1960 | 907.88 Degree days | +3.1% |
| 1961 | 746.79 Degree days | -17.7% |
| 1962 | 1,013 Degree days | +35.7% |
| 1963 | 1,012 Degree days | -0.2% |
| 1964 | 1,097 Degree days | +8.5% |
| 1965 | 978.61 Degree days | -10.8% |
| 1966 | 892.22 Degree days | -8.8% |
| 1967 | 1,026 Degree days | +14.9% |
| 1968 | 956.93 Degree days | -6.7% |
| 1969 | 1,202 Degree days | +25.6% |
| 1970 | 1,115 Degree days | -7.3% |
| 1971 | 1,146 Degree days | +2.8% |
| 1972 | 1,149 Degree days | +0.3% |
| 1973 | 1,072 Degree days | -6.7% |
| 1974 | 1,060 Degree days | -1.1% |
| 1975 | 1,091 Degree days | +2.9% |
| 1976 | 1,103 Degree days | +1.1% |
| 1977 | 1,057 Degree days | -4.1% |
| 1978 | 1,444 Degree days | +36.6% |
| 1979 | 1,087 Degree days | -24.7% |
| 1980 | 1,024 Degree days | -5.8% |
| 1981 | 919.4 Degree days | -10.2% |
| 1982 | 907.95 Degree days | -1.2% |
| 1983 | 960.43 Degree days | +5.8% |
| 1984 | 1,019 Degree days | +6.1% |
| 1985 | 1,007 Degree days | -1.2% |
| 1986 | 1,065 Degree days | +5.8% |
| 1987 | 872.46 Degree days | -18.1% |
| 1988 | 900.2 Degree days | +3.2% |
| 1989 | 782.31 Degree days | -13.1% |
| 1990 | 863.85 Degree days | +10.4% |
| 1991 | 1,009 Degree days | +16.8% |
| 1992 | 988.88 Degree days | -2.0% |
| 1993 | 1,016 Degree days | +2.7% |
| 1994 | 863.22 Degree days | -15.0% |
| 1995 | 690.75 Degree days | -20.0% |
| 1996 | 935.3 Degree days | +35.4% |
| 1997 | 669.42 Degree days | -28.4% |
| 1998 | 835.15 Degree days | +24.8% |
| 1999 | 973.32 Degree days | +16.5% |
| 2000 | 935.8 Degree days | -3.9% |
| 2001 | 944.09 Degree days | +0.9% |
| 2002 | 825.04 Degree days | -12.6% |
| 2003 | 894.15 Degree days | +8.4% |
| 2004 | 993.54 Degree days | +11.1% |
| 2005 | 1,073 Degree days | +8.0% |
| 2006 | 905.14 Degree days | -15.6% |
| 2007 | 937.26 Degree days | +3.5% |
| 2008 | 933.77 Degree days | -0.4% |
| 2009 | 892.9 Degree days | -4.4% |
| 2010 | 1,010 Degree days | +13.1% |
| 2011 | 835.82 Degree days | -17.2% |
| 2012 | 1,012 Degree days | +21.0% |
| 2013 | 993.21 Degree days | -1.8% |
| 2014 | 828.61 Degree days | -16.6% |
| 2015 | 793.43 Degree days | -4.2% |
| 2016 | 863.33 Degree days | +8.8% |
| 2017 | 816.61 Degree days | -5.4% |
| 2018 | 909.66 Degree days | +11.4% |
| 2019 | 855.58 Degree days | -5.9% |
| 2020 | 718.15 Degree days | -16.1% |
| 2021 | 785.58 Degree days | +9.4% |
| 2022 | 667.33 Degree days | -15.1% |
| 2023 | 806.7 Degree days | +20.9% |
| 2024 | 740.95 Degree days | -8.2% |
| 2025 | 747.72 Degree days | +0.9% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 1,007 Degree days | 803.63 Degree days | 1,256 Degree days | 10 |
| 1960s | 983.26 Degree days | 746.79 Degree days | 1,202 Degree days | 10 |
| 1970s | 1,132 Degree days | 1,057 Degree days | 1,444 Degree days | 10 |
| 1980s | 945.81 Degree days | 782.31 Degree days | 1,065 Degree days | 10 |
| 1990s | 884.47 Degree days | 669.42 Degree days | 1,016 Degree days | 10 |
| 2000s | 933.42 Degree days | 825.04 Degree days | 1,073 Degree days | 10 |
| 2010s | 891.78 Degree days | 793.43 Degree days | 1,012 Degree days | 10 |
| 2020s | 744.41 Degree days | 667.33 Degree days | 806.7 Degree days | 6 |
More reference data data for Porto
- Cooling and heating degree days - Cities and FUAs — Cooling degree 137.03 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -13.42 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -173.03 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating 3.76 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate 0.9132 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -149.21 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -5.54 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 14.73 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation -2.06 Days per year (2024)
- Dependency ratio - Cities and FUAs 37.5 Percentage of population aged 15-64 years (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in Porto?
- Cooling and heating degree days - cities and fuas in Porto was 747.72 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 Porto?
- The highest recorded value was 1,444 Degree days in 1978.
- What is the lowest cooling and heating degree days - cities and fuas recorded in Porto?
- The lowest recorded value was 667.33 Degree days in 2022.
- How does Porto rank for cooling and heating degree days - cities and fuas?
- Porto ranks 7th out of 9 groups with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in Porto?
- Over the last ten years it is down 5.8%. The long-run trend across the full record is falling.
- Where does this Porto 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