Cooling and heating degree days - Cities and FUAs in St. Helens
St. Helens: Cooling and heating degree days - Cities and FUAs was 1,750 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in St. Helens, 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 St. Helens stood at 1,750 Degree days. That is the lowest value across all 76 years on record.
The figure is down 10.6% on the previous year and down 14.2% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in St. Helens peaked at 2,731 Degree days in 1963 and was at its lowest, 1,750 Degree days, in 2025.
St. Helens ranks 527th of 1314 regions on this measure, 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 St. Helens, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 2,309 Degree days | — |
| 1951 | 2,365 Degree days | +2.4% |
| 1952 | 2,416 Degree days | +2.2% |
| 1953 | 2,137 Degree days | -11.6% |
| 1954 | 2,305 Degree days | +7.9% |
| 1955 | 2,500 Degree days | +8.5% |
| 1956 | 2,465 Degree days | -1.4% |
| 1957 | 2,117 Degree days | -14.1% |
| 1958 | 2,363 Degree days | +11.6% |
| 1959 | 2,039 Degree days | -13.7% |
| 1960 | 2,196 Degree days | +7.7% |
| 1961 | 2,135 Degree days | -2.8% |
| 1962 | 2,551 Degree days | +19.5% |
| 1963 | 2,731 Degree days | +7.0% |
| 1964 | 2,339 Degree days | -14.4% |
| 1965 | 2,435 Degree days | +4.1% |
| 1966 | 2,304 Degree days | -5.4% |
| 1967 | 2,209 Degree days | -4.1% |
| 1968 | 2,353 Degree days | +6.5% |
| 1969 | 2,552 Degree days | +8.5% |
| 1970 | 2,269 Degree days | -11.1% |
| 1971 | 2,107 Degree days | -7.2% |
| 1972 | 2,315 Degree days | +9.9% |
| 1973 | 2,259 Degree days | -2.4% |
| 1974 | 2,213 Degree days | -2.0% |
| 1975 | 2,201 Degree days | -0.5% |
| 1976 | 2,295 Degree days | +4.3% |
| 1977 | 2,314 Degree days | +0.8% |
| 1978 | 2,287 Degree days | -1.1% |
| 1979 | 2,546 Degree days | +11.3% |
| 1980 | 2,286 Degree days | -10.2% |
| 1981 | 2,374 Degree days | +3.8% |
| 1982 | 2,194 Degree days | -7.6% |
| 1983 | 2,188 Degree days | -0.3% |
| 1984 | 2,251 Degree days | +2.8% |
| 1985 | 2,457 Degree days | +9.2% |
| 1986 | 2,494 Degree days | +1.5% |
| 1987 | 2,418 Degree days | -3.0% |
| 1988 | 2,080 Degree days | -14.0% |
| 1989 | 2,015 Degree days | -3.1% |
| 1990 | 1,879 Degree days | -6.7% |
| 1991 | 2,225 Degree days | +18.4% |
| 1992 | 2,184 Degree days | -1.8% |
| 1993 | 2,264 Degree days | +3.6% |
| 1994 | 2,092 Degree days | -7.6% |
| 1995 | 2,098 Degree days | +0.3% |
| 1996 | 2,411 Degree days | +14.9% |
| 1997 | 2,004 Degree days | -16.9% |
| 1998 | 1,968 Degree days | -1.8% |
| 1999 | 1,953 Degree days | -0.8% |
| 2000 | 2,076 Degree days | +6.3% |
| 2001 | 2,225 Degree days | +7.2% |
| 2002 | 1,932 Degree days | -13.2% |
| 2003 | 2,028 Degree days | +5.0% |
| 2004 | 1,964 Degree days | -3.2% |
| 2005 | 1,956 Degree days | -0.4% |
| 2006 | 1,953 Degree days | -0.2% |
| 2007 | 1,878 Degree days | -3.8% |
| 2008 | 2,112 Degree days | +12.4% |
| 2009 | 2,110 Degree days | -0.1% |
| 2010 | 2,555 Degree days | +21.1% |
| 2011 | 1,864 Degree days | -27.0% |
| 2012 | 2,236 Degree days | +19.9% |
| 2013 | 2,318 Degree days | +3.6% |
| 2014 | 1,831 Degree days | -21.0% |
| 2015 | 2,038 Degree days | +11.3% |
| 2016 | 2,055 Degree days | +0.8% |
| 2017 | 1,862 Degree days | -9.4% |
| 2018 | 1,999 Degree days | +7.3% |
| 2019 | 1,992 Degree days | -0.3% |
| 2020 | 1,911 Degree days | -4.1% |
| 2021 | 2,039 Degree days | +6.7% |
| 2022 | 1,819 Degree days | -10.8% |
| 2023 | 1,952 Degree days | +7.3% |
| 2024 | 1,956 Degree days | +0.2% |
| 2025 | 1,750 Degree days | -10.6% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 2,302 Degree days | 2,039 Degree days | 2,500 Degree days | 10 |
| 1960s | 2,381 Degree days | 2,135 Degree days | 2,731 Degree days | 10 |
| 1970s | 2,281 Degree days | 2,107 Degree days | 2,546 Degree days | 10 |
| 1980s | 2,276 Degree days | 2,015 Degree days | 2,494 Degree days | 10 |
| 1990s | 2,108 Degree days | 1,879 Degree days | 2,411 Degree days | 10 |
| 2000s | 2,023 Degree days | 1,878 Degree days | 2,225 Degree days | 10 |
| 2010s | 2,075 Degree days | 1,831 Degree days | 2,555 Degree days | 10 |
| 2020s | 1,905 Degree days | 1,750 Degree days | 2,039 Degree days | 6 |
More reference data data for St. Helens
- Cooling and heating degree days - Cities and FUAs — Cooling degree 0.6869 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -5.47 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -395.08 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -109.96 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -10.58 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -188.44 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -83.87 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 3.5 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation 1.33 Days per year (2024)
- Dependency ratio - Cities and FUAs 32.6 Percentage of population aged 15-64 years (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in St. Helens?
- Cooling and heating degree days - cities and fuas in St. Helens was 1,750 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 St. Helens?
- The highest recorded value was 2,731 Degree days in 1963.
- What is the lowest cooling and heating degree days - cities and fuas recorded in St. Helens?
- The lowest recorded value was 1,750 Degree days in 2025.
- How does St. Helens rank for cooling and heating degree days - cities and fuas?
- St. Helens ranks 527th out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in St. Helens?
- Over the last ten years it is down 14.2%. The long-run trend across the full record is falling.
- Where does this St. Helens 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