Air temperature, hot days, tropical nights and icing days - Cities in New Haven
New Haven: Air temperature, hot days, tropical nights and icing days - Cities was 2.52 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in New Haven, 1981–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degrees celsius.
Analysis
In 2025, air temperature, hot days, tropical nights and icing days - cities in New Haven stood at 2.52 Degrees celsius. That is the highest value across all 45 years on record.
That represents a change of up 79.1% on the previous year and up 1,889.9% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in New Haven peaked at 2.52 Degrees celsius in 2025 and was at its lowest, -1 Degrees celsius, in 2003.
That places New Haven 303rd out of 1314 regions with data for 2025, putting it in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Air temperature, hot days, tropical nights and icing days - Cities in New Haven, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | -0.4787 Degrees celsius | — |
| 1982 | -0.5182 Degrees celsius | +8.3% |
| 1983 | 0.2998 Degrees celsius | -157.8% |
| 1984 | -0.0308 Degrees celsius | -110.3% |
| 1985 | -0.1641 Degrees celsius | +433.2% |
| 1986 | -0.264 Degrees celsius | +60.9% |
| 1987 | -0.324 Degrees celsius | +22.7% |
| 1988 | -0.3431 Degrees celsius | +5.9% |
| 1989 | -0.6834 Degrees celsius | +99.2% |
| 1990 | 0.8136 Degrees celsius | -219.1% |
| 1991 | 1.1 Degrees celsius | +35.6% |
| 1992 | -0.7448 Degrees celsius | -167.5% |
| 1993 | -0.1839 Degrees celsius | -75.3% |
| 1994 | -0.3504 Degrees celsius | +90.5% |
| 1995 | -0.0279 Degrees celsius | -92.0% |
| 1996 | -0.7544 Degrees celsius | +2604.5% |
| 1997 | -0.4032 Degrees celsius | -46.6% |
| 1998 | 1.09 Degrees celsius | -369.3% |
| 1999 | 0.7263 Degrees celsius | -33.1% |
| 2000 | -0.6866 Degrees celsius | -194.5% |
| 2001 | 0.4385 Degrees celsius | -163.9% |
| 2002 | 0.7127 Degrees celsius | +62.5% |
| 2003 | -1 Degrees celsius | -240.6% |
| 2004 | -0.4725 Degrees celsius | -52.8% |
| 2005 | 0.0773 Degrees celsius | -116.4% |
| 2006 | 0.8997 Degrees celsius | +1063.1% |
| 2007 | 0.2682 Degrees celsius | -70.2% |
| 2008 | 0.3886 Degrees celsius | +44.9% |
| 2009 | -0.4344 Degrees celsius | -211.8% |
| 2010 | 1.05 Degrees celsius | -342.3% |
| 2011 | 0.6025 Degrees celsius | -42.8% |
| 2012 | 1.56 Degrees celsius | +158.6% |
| 2013 | -0.0061 Degrees celsius | -100.4% |
| 2014 | -0.5629 Degrees celsius | +9063.7% |
| 2015 | 0.1266 Degrees celsius | -122.5% |
| 2016 | 1.05 Degrees celsius | +731.9% |
| 2017 | 0.5538 Degrees celsius | -47.4% |
| 2018 | 0.4862 Degrees celsius | -12.2% |
| 2019 | 0.2643 Degrees celsius | -45.6% |
| 2020 | 1.37 Degrees celsius | +417.4% |
| 2021 | 0.9896 Degrees celsius | -27.6% |
| 2022 | 0.8502 Degrees celsius | -14.1% |
| 2023 | 1.39 Degrees celsius | +64.1% |
| 2024 | 1.41 Degrees celsius | +0.8% |
| 2025 | 2.52 Degrees celsius | +79.1% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.2785 Degrees celsius | -0.6834 Degrees celsius | 0.2998 Degrees celsius | 9 |
| 1990s | 0.1265 Degrees celsius | -0.7544 Degrees celsius | 1.1 Degrees celsius | 10 |
| 2000s | 0.0189 Degrees celsius | -1 Degrees celsius | 0.8997 Degrees celsius | 10 |
| 2010s | 0.5128 Degrees celsius | -0.5629 Degrees celsius | 1.56 Degrees celsius | 10 |
| 2020s | 1.42 Degrees celsius | 0.8502 Degrees celsius | 2.52 Degrees celsius | 6 |
More climate change data for New Haven
- Air temperature, hot days, tropical nights and icing days - Cities 12.93 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 13.78 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 2.31 Degrees celsius (2060)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.01 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 1.38 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.85 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.8 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 3.32 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 1.66 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 7.44 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in New Haven?
- Air temperature, hot days, tropical nights and icing days - cities in New Haven was 2.52 Degrees celsius in 2025, according to Organisation for Economic Co-operation and Development.
- What is the highest air temperature, hot days, tropical nights and icing days - cities recorded in New Haven?
- The highest recorded value was 2.52 Degrees celsius in 2025.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in New Haven?
- The lowest recorded value was -1 Degrees celsius in 2003.
- How does New Haven rank for air temperature, hot days, tropical nights and icing days - cities?
- New Haven ranks 303rd out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in New Haven?
- Over the last ten years it is up 1,889.9%. The long-run trend across the full record is volatile.
- Where does this New Haven data come from?
- The figures come from Organisation for Economic Co-operation and Development, published as part of Air temperature, hot days, tropical nights and icing days - Cities and FUAs — Change in air temperature at 2 meters from 1981–2010 period. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 45 observations, free to reuse under OECD Terms and Conditions (attribution required).
About this data
This dataset provides indicators of air temperature, hot days, tropical nights and icing days. Data sources and methodology Indicators are estimated using ERA5-Land data. Air temperature indicators correspond to the average annual air temperature at a height of 2 meters. Hot days correspond to the number of days when the maximum temperature exceeds 35°C. Tropical nights correspond to the days when the minimum temperature is above 20°C, and icing days to the number of days when the maximum temperature is below 0°C. 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. 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 (Air temperature, hot days, tropical nights and icing days - 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