Air temperature, hot days, tropical nights and icing days - Cities in Helsinki/Helsingfors
Helsinki/Helsingfors: Air temperature, hot days, tropical nights and icing days - Cities was 1.46 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in Helsinki/Helsingfors, 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 Helsinki/Helsingfors is 1.46 Degrees celsius, measured in 2025.
The figure is down 24.0% on the previous year and down 15.9% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in Helsinki/Helsingfors peaked at 2.72 Degrees celsius in 2020 and was at its lowest, -2.6 Degrees celsius, in 1987.
That places Helsinki/Helsingfors 472nd 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 Helsinki/Helsingfors, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | -0.9397 Degrees celsius | — |
| 1982 | -0.2253 Degrees celsius | -76.0% |
| 1983 | 0.219 Degrees celsius | -197.2% |
| 1984 | 0.1257 Degrees celsius | -42.6% |
| 1985 | -2.39 Degrees celsius | -2003.5% |
| 1986 | -0.9608 Degrees celsius | -59.9% |
| 1987 | -2.6 Degrees celsius | +170.5% |
| 1988 | 0.1785 Degrees celsius | -106.9% |
| 1989 | 1.53 Degrees celsius | +755.2% |
| 1990 | 1.01 Degrees celsius | -34.0% |
| 1991 | 0.4365 Degrees celsius | -56.7% |
| 1992 | 0.6725 Degrees celsius | +54.1% |
| 1993 | -0.3022 Degrees celsius | -144.9% |
| 1994 | -0.4703 Degrees celsius | +55.7% |
| 1995 | 0.2805 Degrees celsius | -159.6% |
| 1996 | -1.12 Degrees celsius | -499.5% |
| 1997 | 0.2675 Degrees celsius | -123.9% |
| 1998 | -0.4746 Degrees celsius | -277.4% |
| 1999 | 0.5004 Degrees celsius | -205.4% |
| 2000 | 1.14 Degrees celsius | +128.4% |
| 2001 | -0.145 Degrees celsius | -112.7% |
| 2002 | 0.2438 Degrees celsius | -268.1% |
| 2003 | -0.0589 Degrees celsius | -124.2% |
| 2004 | 0.0116 Degrees celsius | -119.7% |
| 2005 | 0.4608 Degrees celsius | +3866.9% |
| 2006 | 0.75 Degrees celsius | +62.8% |
| 2007 | 0.8737 Degrees celsius | +16.5% |
| 2008 | 1.67 Degrees celsius | +90.9% |
| 2009 | 0.176 Degrees celsius | -89.4% |
| 2010 | -0.8523 Degrees celsius | -584.2% |
| 2011 | 1.09 Degrees celsius | -227.7% |
| 2012 | -0.107 Degrees celsius | -109.8% |
| 2013 | 0.9332 Degrees celsius | -972.0% |
| 2014 | 1.52 Degrees celsius | +62.7% |
| 2015 | 1.73 Degrees celsius | +14.2% |
| 2016 | 0.7036 Degrees celsius | -59.4% |
| 2017 | 0.604 Degrees celsius | -14.1% |
| 2018 | 1.33 Degrees celsius | +119.9% |
| 2019 | 1.39 Degrees celsius | +4.6% |
| 2020 | 2.72 Degrees celsius | +96.0% |
| 2021 | 0.6227 Degrees celsius | -77.1% |
| 2022 | 1.09 Degrees celsius | +74.8% |
| 2023 | 1.09 Degrees celsius | +0.4% |
| 2024 | 1.92 Degrees celsius | +75.4% |
| 2025 | 1.46 Degrees celsius | -24.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.5631 Degrees celsius | -2.6 Degrees celsius | 1.53 Degrees celsius | 9 |
| 1990s | 0.0798 Degrees celsius | -1.12 Degrees celsius | 1.01 Degrees celsius | 10 |
| 2000s | 0.5123 Degrees celsius | -0.145 Degrees celsius | 1.67 Degrees celsius | 10 |
| 2010s | 0.8338 Degrees celsius | -0.8523 Degrees celsius | 1.73 Degrees celsius | 10 |
| 2020s | 1.48 Degrees celsius | 0.6227 Degrees celsius | 2.72 Degrees celsius | 6 |
More climate change data for Helsinki/Helsingfors
- Air temperature, hot days, tropical nights and icing days - Cities 6.78 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 7.02 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 1.73 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 0.17 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.19 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.18 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 0.75 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 0.12 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 1.57 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in Helsinki/Helsingfors?
- Air temperature, hot days, tropical nights and icing days - cities in Helsinki/Helsingfors was 1.46 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 Helsinki/Helsingfors?
- The highest recorded value was 2.72 Degrees celsius in 2020.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in Helsinki/Helsingfors?
- The lowest recorded value was -2.6 Degrees celsius in 1987.
- How does Helsinki/Helsingfors rank for air temperature, hot days, tropical nights and icing days - cities?
- Helsinki/Helsingfors ranks 472nd out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in Helsinki/Helsingfors?
- Over the last ten years it is down 15.9%. The long-run trend across the full record is volatile.
- Where does this Helsinki/Helsingfors 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