Cooling and heating degree days - Cities and FUAs — Cooling degree in Phoenix
Phoenix: Cooling and heating degree days - Cities and FUAs — Cooling degree was 1,543 Degree days in 2025. ▲ Rising
Cooling and heating degree days - Cities and FUAs — Cooling degree in Phoenix, 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 — cooling degree in Phoenix stood at 1,543 Degree days.
That represents a change of down 16.8% on the previous year and down 2.9% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas — cooling degree in Phoenix peaked at 1,902 Degree days in 2020 and was at its lowest, 1,286 Degree days, in 1982.
That places Phoenix 29th out of 1314 regions with data for 2025, putting it in the top 10%.
The long-run direction has been consistently rising across the 76 years of available data.
Cooling and heating degree days - Cities and FUAs — Cooling degree in Phoenix, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 1,500 Degree days | — |
| 1951 | 1,445 Degree days | -3.6% |
| 1952 | 1,553 Degree days | +7.5% |
| 1953 | 1,453 Degree days | -6.5% |
| 1954 | 1,543 Degree days | +6.2% |
| 1955 | 1,293 Degree days | -16.2% |
| 1956 | 1,537 Degree days | +18.9% |
| 1957 | 1,415 Degree days | -7.9% |
| 1958 | 1,567 Degree days | +10.7% |
| 1959 | 1,448 Degree days | -7.6% |
| 1960 | 1,599 Degree days | +10.4% |
| 1961 | 1,394 Degree days | -12.8% |
| 1962 | 1,510 Degree days | +8.3% |
| 1963 | 1,459 Degree days | -3.4% |
| 1964 | 1,366 Degree days | -6.4% |
| 1965 | 1,321 Degree days | -3.3% |
| 1966 | 1,505 Degree days | +13.9% |
| 1967 | 1,345 Degree days | -10.6% |
| 1968 | 1,351 Degree days | +0.4% |
| 1969 | 1,479 Degree days | +9.5% |
| 1970 | 1,417 Degree days | -4.2% |
| 1971 | 1,362 Degree days | -3.9% |
| 1972 | 1,444 Degree days | +6.0% |
| 1973 | 1,474 Degree days | +2.1% |
| 1974 | 1,511 Degree days | +2.5% |
| 1975 | 1,376 Degree days | -8.9% |
| 1976 | 1,347 Degree days | -2.1% |
| 1977 | 1,464 Degree days | +8.7% |
| 1978 | 1,546 Degree days | +5.6% |
| 1979 | 1,483 Degree days | -4.1% |
| 1980 | 1,519 Degree days | +2.5% |
| 1981 | 1,577 Degree days | +3.8% |
| 1982 | 1,286 Degree days | -18.5% |
| 1983 | 1,298 Degree days | +1.0% |
| 1984 | 1,313 Degree days | +1.1% |
| 1985 | 1,461 Degree days | +11.2% |
| 1986 | 1,374 Degree days | -5.9% |
| 1987 | 1,460 Degree days | +6.2% |
| 1988 | 1,550 Degree days | +6.2% |
| 1989 | 1,663 Degree days | +7.3% |
| 1990 | 1,434 Degree days | -13.8% |
| 1991 | 1,423 Degree days | -0.7% |
| 1992 | 1,402 Degree days | -1.5% |
| 1993 | 1,408 Degree days | +0.4% |
| 1994 | 1,595 Degree days | +13.3% |
| 1995 | 1,516 Degree days | -4.9% |
| 1996 | 1,639 Degree days | +8.1% |
| 1997 | 1,601 Degree days | -2.3% |
| 1998 | 1,391 Degree days | -13.1% |
| 1999 | 1,468 Degree days | +5.5% |
| 2000 | 1,662 Degree days | +13.2% |
| 2001 | 1,678 Degree days | +1.0% |
| 2002 | 1,573 Degree days | -6.3% |
| 2003 | 1,624 Degree days | +3.3% |
| 2004 | 1,497 Degree days | -7.9% |
| 2005 | 1,550 Degree days | +3.5% |
| 2006 | 1,571 Degree days | +1.4% |
| 2007 | 1,661 Degree days | +5.7% |
| 2008 | 1,519 Degree days | -8.5% |
| 2009 | 1,638 Degree days | +7.8% |
| 2010 | 1,553 Degree days | -5.2% |
| 2011 | 1,625 Degree days | +4.7% |
| 2012 | 1,617 Degree days | -0.5% |
| 2013 | 1,545 Degree days | -4.5% |
| 2014 | 1,543 Degree days | -0.1% |
| 2015 | 1,589 Degree days | +3.0% |
| 2016 | 1,609 Degree days | +1.3% |
| 2017 | 1,673 Degree days | +4.0% |
| 2018 | 1,631 Degree days | -2.5% |
| 2019 | 1,532 Degree days | -6.1% |
| 2020 | 1,902 Degree days | +24.1% |
| 2021 | 1,613 Degree days | -15.2% |
| 2022 | 1,631 Degree days | +1.1% |
| 2023 | 1,658 Degree days | +1.7% |
| 2024 | 1,855 Degree days | +11.9% |
| 2025 | 1,543 Degree days | -16.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 1,475 Degree days | 1,293 Degree days | 1,567 Degree days | 10 |
| 1960s | 1,433 Degree days | 1,321 Degree days | 1,599 Degree days | 10 |
| 1970s | 1,442 Degree days | 1,347 Degree days | 1,546 Degree days | 10 |
| 1980s | 1,450 Degree days | 1,286 Degree days | 1,663 Degree days | 10 |
| 1990s | 1,488 Degree days | 1,391 Degree days | 1,639 Degree days | 10 |
| 2000s | 1,597 Degree days | 1,497 Degree days | 1,678 Degree days | 10 |
| 2010s | 1,592 Degree days | 1,532 Degree days | 1,673 Degree days | 10 |
| 2020s | 1,700 Degree days | 1,543 Degree days | 1,902 Degree days | 6 |
More reference data data for Phoenix
- Cooling and heating degree days - Cities and FUAs — Change in cooling 30.16 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs 251.43 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -323.49 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -916.91 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -53.71 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -91.19 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -16.82 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 1.33 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation -1.34 Days per year (2024)
- Dependency ratio - Cities and FUAs 25.8 Percentage of population aged 15-64 years (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas — cooling degree in Phoenix?
- Cooling and heating degree days - cities and fuas — cooling degree in Phoenix was 1,543 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 — cooling degree recorded in Phoenix?
- The highest recorded value was 1,902 Degree days in 2020.
- What is the lowest cooling and heating degree days - cities and fuas — cooling degree recorded in Phoenix?
- The lowest recorded value was 1,286 Degree days in 1982.
- How does Phoenix rank for cooling and heating degree days - cities and fuas — cooling degree?
- Phoenix ranks 29th out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas — cooling degree rising or falling in Phoenix?
- Over the last ten years it is down 2.9%. The long-run trend across the full record is rising.
- Where does this Phoenix 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 — Cooling degree days. 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