Air temperature, hot days, tropical nights and icing days - Cities in Wellington
Wellington: Air temperature, hot days, tropical nights and icing days - Cities was 4.51 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in Wellington, 1981–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degrees celsius.
Analysis
Wellington recorded 4.51 Degrees celsius for air temperature, hot days, tropical nights and icing days - cities in 2025. That is the highest value across all 45 years on record.
Compared with earlier readings it is up 582.6% on the previous year and up 1,607.7% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in Wellington peaked at 4.51 Degrees celsius in 2025 and was at its lowest, -1.02 Degrees celsius, in 1992.
Wellington ranks 121st of 1314 regions on this measure, in the top 10%.
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 Wellington, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | 0.2647 Degrees celsius | — |
| 1982 | -0.415 Degrees celsius | -256.8% |
| 1983 | -0.5179 Degrees celsius | +24.8% |
| 1984 | 0.149 Degrees celsius | -128.8% |
| 1985 | 0.1401 Degrees celsius | -6.0% |
| 1986 | 0.0395 Degrees celsius | -71.8% |
| 1987 | 0.0404 Degrees celsius | +2.4% |
| 1988 | 0.3458 Degrees celsius | +756.0% |
| 1989 | 0.3379 Degrees celsius | -2.3% |
| 1990 | 0.515 Degrees celsius | +52.4% |
| 1991 | -0.3321 Degrees celsius | -164.5% |
| 1992 | -1.02 Degrees celsius | +206.5% |
| 1993 | -0.8778 Degrees celsius | -13.8% |
| 1994 | -0.2986 Degrees celsius | -66.0% |
| 1995 | -0.1278 Degrees celsius | -57.2% |
| 1996 | -0.2666 Degrees celsius | +108.5% |
| 1997 | -0.4572 Degrees celsius | +71.5% |
| 1998 | 0.7467 Degrees celsius | -263.3% |
| 1999 | 0.6202 Degrees celsius | -16.9% |
| 2000 | 0.0411 Degrees celsius | -93.4% |
| 2001 | 0.3939 Degrees celsius | +857.8% |
| 2002 | 0.1087 Degrees celsius | -72.4% |
| 2003 | 0.1987 Degrees celsius | +82.8% |
| 2004 | -0.4163 Degrees celsius | -309.5% |
| 2005 | 0.5188 Degrees celsius | -224.6% |
| 2006 | -0.0585 Degrees celsius | -111.3% |
| 2007 | 0.1316 Degrees celsius | -324.8% |
| 2008 | 0.3474 Degrees celsius | +164.0% |
| 2009 | -0.4482 Degrees celsius | -229.0% |
| 2010 | 0.2946 Degrees celsius | -165.7% |
| 2011 | 0.1208 Degrees celsius | -59.0% |
| 2012 | -0.1497 Degrees celsius | -223.9% |
| 2013 | 0.7981 Degrees celsius | -633.1% |
| 2014 | 0.2533 Degrees celsius | -68.3% |
| 2015 | 0.2641 Degrees celsius | +4.3% |
| 2016 | 0.9869 Degrees celsius | +273.6% |
| 2017 | 0.6151 Degrees celsius | -37.7% |
| 2018 | 0.9996 Degrees celsius | +62.5% |
| 2019 | 0.8184 Degrees celsius | -18.1% |
| 2020 | 0.5945 Degrees celsius | -27.4% |
| 2021 | 0.8784 Degrees celsius | +47.7% |
| 2022 | 1.07 Degrees celsius | +21.3% |
| 2023 | 0.8511 Degrees celsius | -20.1% |
| 2024 | 0.6608 Degrees celsius | -22.4% |
| 2025 | 4.51 Degrees celsius | +582.6% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.0427 Degrees celsius | -0.5179 Degrees celsius | 0.3458 Degrees celsius | 9 |
| 1990s | -0.1496 Degrees celsius | -1.02 Degrees celsius | 0.7467 Degrees celsius | 10 |
| 2000s | 0.0817 Degrees celsius | -0.4482 Degrees celsius | 0.5188 Degrees celsius | 10 |
| 2010s | 0.5001 Degrees celsius | -0.1497 Degrees celsius | 0.9996 Degrees celsius | 10 |
| 2020s | 1.43 Degrees celsius | 0.5945 Degrees celsius | 4.51 Degrees celsius | 6 |
More climate change data for Wellington
- Air temperature, hot days, tropical nights and icing days - Cities 16.53 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 14.14 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 1.81 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 0.09 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.22 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.22 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 0.01 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 0.17 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 0.61 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in Wellington?
- Air temperature, hot days, tropical nights and icing days - cities in Wellington was 4.51 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 Wellington?
- The highest recorded value was 4.51 Degrees celsius in 2025.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in Wellington?
- The lowest recorded value was -1.02 Degrees celsius in 1992.
- How does Wellington rank for air temperature, hot days, tropical nights and icing days - cities?
- Wellington ranks 121st out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in Wellington?
- Over the last ten years it is up 1,607.7%. The long-run trend across the full record is volatile.
- Where does this Wellington 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