Air temperature, hot days, tropical nights and icing days - Cities in London
London: Air temperature, hot days, tropical nights and icing days - Cities was 0.2692 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in London, 1981–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degrees celsius.
Analysis
The most recent figure for air temperature, hot days, tropical nights and icing days - cities in London is 0.2692 Degrees celsius, measured in 2025.
The figure is down 78.0% on the previous year and down 49.3% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in London peaked at 1.46 Degrees celsius in 2022 and was at its lowest, -1.22 Degrees celsius, in 1986.
That places London 703rd out of 1314 regions with data for 2025, putting it in the middle of the range.
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 London, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | -0.8287 Degrees celsius | — |
| 1982 | -0.0415 Degrees celsius | -95.0% |
| 1983 | -0.069 Degrees celsius | +66.3% |
| 1984 | -0.362 Degrees celsius | +425.0% |
| 1985 | -1.11 Degrees celsius | +206.4% |
| 1986 | -1.22 Degrees celsius | +9.6% |
| 1987 | -0.8722 Degrees celsius | -28.2% |
| 1988 | -0.1789 Degrees celsius | -79.5% |
| 1989 | 0.7982 Degrees celsius | -546.1% |
| 1990 | 0.8487 Degrees celsius | +6.3% |
| 1991 | -0.4991 Degrees celsius | -158.8% |
| 1992 | -0.0717 Degrees celsius | -85.6% |
| 1993 | -0.3521 Degrees celsius | +391.0% |
| 1994 | 0.4321 Degrees celsius | -222.7% |
| 1995 | 0.4873 Degrees celsius | +12.8% |
| 1996 | -0.8891 Degrees celsius | -282.5% |
| 1997 | 0.4908 Degrees celsius | -155.2% |
| 1998 | 0.2374 Degrees celsius | -51.6% |
| 1999 | 0.5172 Degrees celsius | +117.8% |
| 2000 | 0.2364 Degrees celsius | -54.3% |
| 2001 | -0.1442 Degrees celsius | -161.0% |
| 2002 | 0.6925 Degrees celsius | -580.2% |
| 2003 | 0.5611 Degrees celsius | -19.0% |
| 2004 | 0.4096 Degrees celsius | -27.0% |
| 2005 | 0.3953 Degrees celsius | -3.5% |
| 2006 | 0.8481 Degrees celsius | +114.5% |
| 2007 | 0.5654 Degrees celsius | -33.3% |
| 2008 | 0.0172 Degrees celsius | -97.0% |
| 2009 | 0.1315 Degrees celsius | +665.7% |
| 2010 | -1.04 Degrees celsius | -887.2% |
| 2011 | 0.864 Degrees celsius | -183.4% |
| 2012 | -0.2739 Degrees celsius | -131.7% |
| 2013 | -0.5123 Degrees celsius | +87.1% |
| 2014 | 1.09 Degrees celsius | -312.3% |
| 2015 | 0.5308 Degrees celsius | -51.2% |
| 2016 | 0.4854 Degrees celsius | -8.5% |
| 2017 | 0.7649 Degrees celsius | +57.6% |
| 2018 | 0.9892 Degrees celsius | +29.3% |
| 2019 | 0.6857 Degrees celsius | -30.7% |
| 2020 | 1.16 Degrees celsius | +68.8% |
| 2021 | 0.2709 Degrees celsius | -76.6% |
| 2022 | 1.46 Degrees celsius | +438.4% |
| 2023 | 1.16 Degrees celsius | -20.2% |
| 2024 | 1.22 Degrees celsius | +5.0% |
| 2025 | 0.2692 Degrees celsius | -78.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.431 Degrees celsius | -1.22 Degrees celsius | 0.7982 Degrees celsius | 9 |
| 1990s | 0.1202 Degrees celsius | -0.8891 Degrees celsius | 0.8487 Degrees celsius | 10 |
| 2000s | 0.3713 Degrees celsius | -0.1442 Degrees celsius | 0.8481 Degrees celsius | 10 |
| 2010s | 0.3586 Degrees celsius | -1.04 Degrees celsius | 1.09 Degrees celsius | 10 |
| 2020s | 0.9236 Degrees celsius | 0.2692 Degrees celsius | 1.46 Degrees celsius | 6 |
More climate change data for London
- Air temperature, hot days, tropical nights and icing days - Cities 10.56 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 10.58 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 2.14 Degrees celsius (2060)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.11 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 10.16 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 3.45 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 3.37 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 0.54 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 5.06 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 21.69 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in London?
- Air temperature, hot days, tropical nights and icing days - cities in London was 0.2692 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 London?
- The highest recorded value was 1.46 Degrees celsius in 2022.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in London?
- The lowest recorded value was -1.22 Degrees celsius in 1986.
- How does London rank for air temperature, hot days, tropical nights and icing days - cities?
- London ranks 703rd out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in London?
- Over the last ten years it is down 49.3%. The long-run trend across the full record is volatile.
- Where does this London 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