Air temperature, hot days, tropical nights and icing days - Cities in Kocaeli
Kocaeli: Air temperature, hot days, tropical nights and icing days - Cities was -1.02 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in Kocaeli, 1981–2025
Source: Organisation for Economic Co-operation and Development. Measured in Degrees celsius.
Analysis
Kocaeli recorded -1.02 Degrees celsius for air temperature, hot days, tropical nights and icing days - cities in 2025.
The figure is down 150.4% on the previous year and down 252.0% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in Kocaeli peaked at 2.03 Degrees celsius in 2024 and was at its lowest, -1.13 Degrees celsius, in 1992.
That places Kocaeli 1002nd 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 Kocaeli, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | -0.1234 Degrees celsius | — |
| 1982 | -0.7114 Degrees celsius | +476.3% |
| 1983 | -0.6007 Degrees celsius | -15.6% |
| 1984 | -0.0353 Degrees celsius | -94.1% |
| 1985 | -0.3532 Degrees celsius | +900.7% |
| 1986 | 0.0786 Degrees celsius | -122.2% |
| 1987 | -0.6081 Degrees celsius | -874.1% |
| 1988 | -0.0442 Degrees celsius | -92.7% |
| 1989 | -0.0423 Degrees celsius | -4.4% |
| 1990 | -0.0059 Degrees celsius | -86.0% |
| 1991 | -0.6208 Degrees celsius | +10419.5% |
| 1992 | -1.13 Degrees celsius | +82.0% |
| 1993 | -0.6986 Degrees celsius | -38.2% |
| 1994 | 0.8119 Degrees celsius | -216.2% |
| 1995 | -0.12 Degrees celsius | -114.8% |
| 1996 | -0.3424 Degrees celsius | +185.4% |
| 1997 | -1.11 Degrees celsius | +224.2% |
| 1998 | 0.4811 Degrees celsius | -143.3% |
| 1999 | 0.7707 Degrees celsius | +60.2% |
| 2000 | -0.1284 Degrees celsius | -116.7% |
| 2001 | 0.775 Degrees celsius | -703.5% |
| 2002 | 0.1364 Degrees celsius | -82.4% |
| 2003 | -0.4041 Degrees celsius | -396.3% |
| 2004 | 0.0265 Degrees celsius | -106.5% |
| 2005 | 0.1281 Degrees celsius | +384.1% |
| 2006 | 0.1093 Degrees celsius | -14.6% |
| 2007 | 0.8129 Degrees celsius | +643.4% |
| 2008 | 0.6992 Degrees celsius | -14.0% |
| 2009 | 0.6997 Degrees celsius | +0.1% |
| 2010 | 1.55 Degrees celsius | +121.4% |
| 2011 | -0.4535 Degrees celsius | -129.3% |
| 2012 | 0.9924 Degrees celsius | -318.8% |
| 2013 | 1.08 Degrees celsius | +9.3% |
| 2014 | 1.41 Degrees celsius | +30.0% |
| 2015 | 0.673 Degrees celsius | -52.3% |
| 2016 | 0.8522 Degrees celsius | +26.6% |
| 2017 | 0.218 Degrees celsius | -74.4% |
| 2018 | 1.57 Degrees celsius | +619.4% |
| 2019 | 1.27 Degrees celsius | -18.8% |
| 2020 | 1.35 Degrees celsius | +6.2% |
| 2021 | 0.6377 Degrees celsius | -52.9% |
| 2022 | 0.4971 Degrees celsius | -22.1% |
| 2023 | 1.47 Degrees celsius | +194.8% |
| 2024 | 2.03 Degrees celsius | +38.5% |
| 2025 | -1.02 Degrees celsius | -150.4% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.2711 Degrees celsius | -0.7114 Degrees celsius | 0.0786 Degrees celsius | 9 |
| 1990s | -0.1964 Degrees celsius | -1.13 Degrees celsius | 0.8119 Degrees celsius | 10 |
| 2000s | 0.2855 Degrees celsius | -0.4041 Degrees celsius | 0.8129 Degrees celsius | 10 |
| 2010s | 0.9168 Degrees celsius | -0.4535 Degrees celsius | 1.57 Degrees celsius | 10 |
| 2020s | 0.8266 Degrees celsius | -1.02 Degrees celsius | 2.03 Degrees celsius | 6 |
More climate change data for Kocaeli
- Air temperature, hot days, tropical nights and icing days - Cities 11.14 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 15.87 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 1.88 Degrees celsius (2060)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.07 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.48 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.32 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.3 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 0.53 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 0.44 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 2 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in Kocaeli?
- Air temperature, hot days, tropical nights and icing days - cities in Kocaeli was -1.02 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 Kocaeli?
- The highest recorded value was 2.03 Degrees celsius in 2024.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in Kocaeli?
- The lowest recorded value was -1.13 Degrees celsius in 1992.
- How does Kocaeli rank for air temperature, hot days, tropical nights and icing days - cities?
- Kocaeli ranks 1002nd out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in Kocaeli?
- Over the last ten years it is down 252.0%. The long-run trend across the full record is volatile.
- Where does this Kocaeli 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