Air temperature, hot days, tropical nights and icing days - Cities in Sliven
Sliven: Air temperature, hot days, tropical nights and icing days - Cities was -0.9745 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in Sliven, 1981–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degrees celsius.
Analysis
Sliven recorded -0.9745 Degrees celsius for air temperature, hot days, tropical nights and icing days - cities in 2025. That is the lowest value across all 45 years on record.
That represents a change of down 140.4% on the previous year and down 185.3% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in Sliven peaked at 2.41 Degrees celsius in 2024 and was at its lowest, -0.9745 Degrees celsius, in 2025.
That places Sliven 991st out of 1314 regions with data for 2025, putting it 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 Sliven, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | -0.2382 Degrees celsius | — |
| 1982 | -0.4383 Degrees celsius | +84.0% |
| 1983 | -0.3393 Degrees celsius | -22.6% |
| 1984 | -0.3569 Degrees celsius | +5.2% |
| 1985 | -0.6967 Degrees celsius | +95.2% |
| 1986 | -0.4343 Degrees celsius | -37.7% |
| 1987 | -0.6796 Degrees celsius | +56.5% |
| 1988 | -0.4074 Degrees celsius | -40.0% |
| 1989 | 0.2127 Degrees celsius | -152.2% |
| 1990 | 0.6928 Degrees celsius | +225.6% |
| 1991 | -0.8237 Degrees celsius | -218.9% |
| 1992 | -0.2497 Degrees celsius | -69.7% |
| 1993 | -0.5259 Degrees celsius | +110.6% |
| 1994 | 0.9369 Degrees celsius | -278.2% |
| 1995 | -0.4321 Degrees celsius | -146.1% |
| 1996 | -0.8033 Degrees celsius | +85.9% |
| 1997 | -0.9464 Degrees celsius | +17.8% |
| 1998 | -0.02 Degrees celsius | -97.9% |
| 1999 | 0.7048 Degrees celsius | -3630.7% |
| 2000 | 0.7766 Degrees celsius | +10.2% |
| 2001 | 0.4974 Degrees celsius | -35.9% |
| 2002 | 0.4502 Degrees celsius | -9.5% |
| 2003 | -0.2495 Degrees celsius | -155.4% |
| 2004 | 0.0652 Degrees celsius | -126.1% |
| 2005 | -0.3081 Degrees celsius | -572.5% |
| 2006 | 0.1065 Degrees celsius | -134.5% |
| 2007 | 1.15 Degrees celsius | +979.8% |
| 2008 | 0.8388 Degrees celsius | -27.0% |
| 2009 | 0.761 Degrees celsius | -9.3% |
| 2010 | 0.757 Degrees celsius | -0.5% |
| 2011 | -0.2684 Degrees celsius | -135.5% |
| 2012 | 1.1 Degrees celsius | -509.8% |
| 2013 | 1.18 Degrees celsius | +7.1% |
| 2014 | 1 Degrees celsius | -15.0% |
| 2015 | 1.14 Degrees celsius | +14.0% |
| 2016 | 1.1 Degrees celsius | -3.7% |
| 2017 | 0.7374 Degrees celsius | -33.0% |
| 2018 | 1.04 Degrees celsius | +41.0% |
| 2019 | 1.78 Degrees celsius | +70.8% |
| 2020 | 1.63 Degrees celsius | -8.4% |
| 2021 | 0.8441 Degrees celsius | -48.1% |
| 2022 | 1.41 Degrees celsius | +67.1% |
| 2023 | 2.09 Degrees celsius | +48.2% |
| 2024 | 2.41 Degrees celsius | +15.4% |
| 2025 | -0.9745 Degrees celsius | -140.4% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.3753 Degrees celsius | -0.6967 Degrees celsius | 0.2127 Degrees celsius | 9 |
| 1990s | -0.1467 Degrees celsius | -0.9464 Degrees celsius | 0.9369 Degrees celsius | 10 |
| 2000s | 0.4088 Degrees celsius | -0.3081 Degrees celsius | 1.15 Degrees celsius | 10 |
| 2010s | 0.9565 Degrees celsius | -0.2684 Degrees celsius | 1.78 Degrees celsius | 10 |
| 2020s | 1.24 Degrees celsius | -0.9745 Degrees celsius | 2.41 Degrees celsius | 6 |
More climate change data for Sliven
- Air temperature, hot days, tropical nights and icing days - Cities 9.86 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 13.28 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 1.83 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 0.02 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 0.14 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 0.12 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 0.19 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 1.08 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in Sliven?
- Air temperature, hot days, tropical nights and icing days - cities in Sliven was -0.9745 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 Sliven?
- The highest recorded value was 2.41 Degrees celsius in 2024.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in Sliven?
- The lowest recorded value was -0.9745 Degrees celsius in 2025.
- How does Sliven rank for air temperature, hot days, tropical nights and icing days - cities?
- Sliven ranks 991st out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in Sliven?
- Over the last ten years it is down 185.3%. The long-run trend across the full record is volatile.
- Where does this Sliven 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