Air temperature, hot days, tropical nights and icing days - Cities in Basel
Basel: Air temperature, hot days, tropical nights and icing days - Cities was -1.38 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in Basel, 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 Basel is -1.38 Degrees celsius, measured in 2025. That is the lowest value across all 45 years on record.
The figure is down 180.6% on the previous year and down 226.2% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in Basel peaked at 2.26 Degrees celsius in 2023 and was at its lowest, -1.38 Degrees celsius, in 2025.
Basel ranks 1072nd of 1314 regions on this measure, in the bottom 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 Basel, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | -0.6943 Degrees celsius | — |
| 1982 | 0.0285 Degrees celsius | -104.1% |
| 1983 | -0.0097 Degrees celsius | -134.0% |
| 1984 | -0.9611 Degrees celsius | +9812.6% |
| 1985 | -1.18 Degrees celsius | +23.1% |
| 1986 | -0.8606 Degrees celsius | -27.2% |
| 1987 | -0.7443 Degrees celsius | -13.5% |
| 1988 | 0.233 Degrees celsius | -131.3% |
| 1989 | 0.4033 Degrees celsius | +73.1% |
| 1990 | 0.4988 Degrees celsius | +23.7% |
| 1991 | -0.1106 Degrees celsius | -122.2% |
| 1992 | 0.3858 Degrees celsius | -448.9% |
| 1993 | 0.0533 Degrees celsius | -86.2% |
| 1994 | 1.24 Degrees celsius | +2225.8% |
| 1995 | -0.0333 Degrees celsius | -102.7% |
| 1996 | -0.9819 Degrees celsius | +2851.0% |
| 1997 | 0.1575 Degrees celsius | -116.0% |
| 1998 | -0.0076 Degrees celsius | -104.8% |
| 1999 | 0.0721 Degrees celsius | -1044.7% |
| 2000 | 0.6768 Degrees celsius | +838.3% |
| 2001 | 0.1026 Degrees celsius | -84.8% |
| 2002 | 0.6163 Degrees celsius | +500.4% |
| 2003 | 0.913 Degrees celsius | +48.1% |
| 2004 | -0.0745 Degrees celsius | -108.2% |
| 2005 | -0.1697 Degrees celsius | +127.7% |
| 2006 | 0.4456 Degrees celsius | -362.6% |
| 2007 | 0.5454 Degrees celsius | +22.4% |
| 2008 | -0.0288 Degrees celsius | -105.3% |
| 2009 | 0.3337 Degrees celsius | -1256.8% |
| 2010 | -0.8454 Degrees celsius | -353.3% |
| 2011 | 1.04 Degrees celsius | -223.1% |
| 2012 | 0.1712 Degrees celsius | -83.6% |
| 2013 | -0.2643 Degrees celsius | -254.4% |
| 2014 | 1.2 Degrees celsius | -553.6% |
| 2015 | 1.09 Degrees celsius | -8.8% |
| 2016 | 0.4389 Degrees celsius | -59.9% |
| 2017 | 0.6743 Degrees celsius | +53.6% |
| 2018 | 1.83 Degrees celsius | +172.0% |
| 2019 | 1.12 Degrees celsius | -38.7% |
| 2020 | 1.66 Degrees celsius | +47.8% |
| 2021 | 0.0498 Degrees celsius | -97.0% |
| 2022 | 2.06 Degrees celsius | +4040.7% |
| 2023 | 2.26 Degrees celsius | +9.7% |
| 2024 | 1.71 Degrees celsius | -24.2% |
| 2025 | -1.38 Degrees celsius | -180.6% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.4209 Degrees celsius | -1.18 Degrees celsius | 0.4033 Degrees celsius | 9 |
| 1990s | 0.1273 Degrees celsius | -0.9819 Degrees celsius | 1.24 Degrees celsius | 10 |
| 2000s | 0.336 Degrees celsius | -0.1697 Degrees celsius | 0.913 Degrees celsius | 10 |
| 2010s | 0.6467 Degrees celsius | -0.8454 Degrees celsius | 1.83 Degrees celsius | 10 |
| 2020s | 1.06 Degrees celsius | -1.38 Degrees celsius | 2.26 Degrees celsius | 6 |
More climate change data for Basel
- Air temperature, hot days, tropical nights and icing days - Cities 7.95 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 11.06 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 1.71 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 0.28 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.17 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.15 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 0.24 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 0.2 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 0.99 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in Basel?
- Air temperature, hot days, tropical nights and icing days - cities in Basel was -1.38 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 Basel?
- The highest recorded value was 2.26 Degrees celsius in 2023.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in Basel?
- The lowest recorded value was -1.38 Degrees celsius in 2025.
- How does Basel rank for air temperature, hot days, tropical nights and icing days - cities?
- Basel ranks 1072nd out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in Basel?
- Over the last ten years it is down 226.2%. The long-run trend across the full record is volatile.
- Where does this Basel 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