Cooling and heating degree days - Cities and FUAs in Sonoma
Sonoma: Cooling and heating degree days - Cities and FUAs was 890.27 Degree days in 2025. ▼ Falling
Cooling and heating degree days - Cities and FUAs in Sonoma, 1950–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degree days.
Analysis
Sonoma recorded 890.27 Degree days for cooling and heating degree days - cities and fuas in 2025.
That represents a change of down 19.1% on the previous year and up 1.4% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas in Sonoma peaked at 1,403 Degree days in 1971 and was at its lowest, 802.7 Degree days, in 2014.
That places Sonoma 923rd 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 in Sonoma, year by year
| Year | Degree days | Change |
|---|---|---|
| 1950 | 1,198 Degree days | — |
| 1951 | 1,287 Degree days | +7.4% |
| 1952 | 1,383 Degree days | +7.5% |
| 1953 | 1,137 Degree days | -17.8% |
| 1954 | 1,193 Degree days | +4.9% |
| 1955 | 1,341 Degree days | +12.5% |
| 1956 | 1,252 Degree days | -6.7% |
| 1957 | 1,224 Degree days | -2.2% |
| 1958 | 924.52 Degree days | -24.5% |
| 1959 | 938.22 Degree days | +1.5% |
| 1960 | 1,253 Degree days | +33.5% |
| 1961 | 1,226 Degree days | -2.1% |
| 1962 | 1,184 Degree days | -3.4% |
| 1963 | 1,250 Degree days | +5.6% |
| 1964 | 1,279 Degree days | +2.3% |
| 1965 | 1,242 Degree days | -2.9% |
| 1966 | 1,204 Degree days | -3.1% |
| 1967 | 1,332 Degree days | +10.7% |
| 1968 | 1,205 Degree days | -9.5% |
| 1969 | 1,395 Degree days | +15.7% |
| 1970 | 1,163 Degree days | -16.7% |
| 1971 | 1,403 Degree days | +20.7% |
| 1972 | 1,331 Degree days | -5.1% |
| 1973 | 1,196 Degree days | -10.1% |
| 1974 | 1,267 Degree days | +5.9% |
| 1975 | 1,361 Degree days | +7.4% |
| 1976 | 1,114 Degree days | -18.1% |
| 1977 | 1,127 Degree days | +1.2% |
| 1978 | 1,116 Degree days | -1.0% |
| 1979 | 1,212 Degree days | +8.6% |
| 1980 | 1,146 Degree days | -5.5% |
| 1981 | 1,029 Degree days | -10.2% |
| 1982 | 1,339 Degree days | +30.1% |
| 1983 | 1,160 Degree days | -13.4% |
| 1984 | 1,179 Degree days | +1.6% |
| 1985 | 1,301 Degree days | +10.4% |
| 1986 | 954.69 Degree days | -26.6% |
| 1987 | 1,116 Degree days | +16.9% |
| 1988 | 1,104 Degree days | -1.1% |
| 1989 | 1,214 Degree days | +10.0% |
| 1990 | 1,150 Degree days | -5.2% |
| 1991 | 1,144 Degree days | -0.5% |
| 1992 | 985.27 Degree days | -13.9% |
| 1993 | 1,120 Degree days | +13.7% |
| 1994 | 1,219 Degree days | +8.8% |
| 1995 | 959.5 Degree days | -21.3% |
| 1996 | 948.98 Degree days | -1.1% |
| 1997 | 930.61 Degree days | -1.9% |
| 1998 | 1,292 Degree days | +38.8% |
| 1999 | 1,271 Degree days | -1.6% |
| 2000 | 1,151 Degree days | -9.4% |
| 2001 | 1,166 Degree days | +1.3% |
| 2002 | 1,161 Degree days | -0.5% |
| 2003 | 1,105 Degree days | -4.8% |
| 2004 | 1,067 Degree days | -3.4% |
| 2005 | 1,057 Degree days | -0.9% |
| 2006 | 1,227 Degree days | +16.0% |
| 2007 | 1,153 Degree days | -6.0% |
| 2008 | 1,201 Degree days | +4.1% |
| 2009 | 1,158 Degree days | -3.6% |
| 2010 | 1,242 Degree days | +7.3% |
| 2011 | 1,293 Degree days | +4.0% |
| 2012 | 1,156 Degree days | -10.6% |
| 2013 | 1,103 Degree days | -4.6% |
| 2014 | 802.7 Degree days | -27.2% |
| 2015 | 877.57 Degree days | +9.3% |
| 2016 | 969.69 Degree days | +10.5% |
| 2017 | 1,026 Degree days | +5.8% |
| 2018 | 973.37 Degree days | -5.1% |
| 2019 | 1,067 Degree days | +9.6% |
| 2020 | 958.62 Degree days | -10.2% |
| 2021 | 1,030 Degree days | +7.5% |
| 2022 | 1,056 Degree days | +2.5% |
| 2023 | 1,300 Degree days | +23.1% |
| 2024 | 1,100 Degree days | -15.4% |
| 2025 | 890.27 Degree days | -19.1% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 1,188 Degree days | 924.52 Degree days | 1,383 Degree days | 10 |
| 1960s | 1,257 Degree days | 1,184 Degree days | 1,395 Degree days | 10 |
| 1970s | 1,229 Degree days | 1,114 Degree days | 1,403 Degree days | 10 |
| 1980s | 1,154 Degree days | 954.69 Degree days | 1,339 Degree days | 10 |
| 1990s | 1,102 Degree days | 930.61 Degree days | 1,292 Degree days | 10 |
| 2000s | 1,145 Degree days | 1,057 Degree days | 1,227 Degree days | 10 |
| 2010s | 1,051 Degree days | 802.7 Degree days | 1,293 Degree days | 10 |
| 2020s | 1,056 Degree days | 890.27 Degree days | 1,300 Degree days | 6 |
More reference data data for Sonoma
- Cooling and heating degree days - Cities and FUAs — Cooling degree 51.81 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -185.63 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -246.59 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -573.1 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -19.08 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -286.12 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Cooling degree -84.63 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 16.77 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation 2.94 Days per year (2024)
- Dependency ratio - Cities and FUAs 36.5 Percentage of population aged 15-64 years (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas in Sonoma?
- Cooling and heating degree days - cities and fuas in Sonoma was 890.27 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 Sonoma?
- The highest recorded value was 1,403 Degree days in 1971.
- What is the lowest cooling and heating degree days - cities and fuas recorded in Sonoma?
- The lowest recorded value was 802.7 Degree days in 2014.
- How does Sonoma rank for cooling and heating degree days - cities and fuas?
- Sonoma ranks 923rd out of 1314 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas rising or falling in Sonoma?
- Over the last ten years it is up 1.4%. The long-run trend across the full record is falling.
- Where does this Sonoma 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