Air temperature, hot days, tropical nights and icing days - Cities in Hamilton
Hamilton: Air temperature, hot days, tropical nights and icing days - Cities was 3.96 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in Hamilton, 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 Hamilton is 3.96 Degrees celsius, measured in 2025. That is the highest value across all 45 years on record.
Compared with earlier readings it is up 766.8% on the previous year and up 1,313.6% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in Hamilton peaked at 3.96 Degrees celsius in 2025 and was at its lowest, -0.9098 Degrees celsius, in 1992.
Hamilton ranks 158th of 1314 regions on this measure, in the top 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 Hamilton, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | 0.2232 Degrees celsius | — |
| 1982 | -0.7764 Degrees celsius | -447.8% |
| 1983 | -0.5655 Degrees celsius | -27.2% |
| 1984 | 0.041 Degrees celsius | -107.2% |
| 1985 | -0.0384 Degrees celsius | -193.7% |
| 1986 | -0.1754 Degrees celsius | +357.0% |
| 1987 | -0.1223 Degrees celsius | -30.3% |
| 1988 | 0.5503 Degrees celsius | -549.9% |
| 1989 | 0.0725 Degrees celsius | -86.8% |
| 1990 | 0.4906 Degrees celsius | +576.9% |
| 1991 | -0.4763 Degrees celsius | -197.1% |
| 1992 | -0.9098 Degrees celsius | +91.0% |
| 1993 | -0.829 Degrees celsius | -8.9% |
| 1994 | -0.2156 Degrees celsius | -74.0% |
| 1995 | 0.1833 Degrees celsius | -185.0% |
| 1996 | -0.1005 Degrees celsius | -154.8% |
| 1997 | -0.4971 Degrees celsius | +394.8% |
| 1998 | 1.15 Degrees celsius | -330.4% |
| 1999 | 0.4521 Degrees celsius | -60.5% |
| 2000 | 0.2375 Degrees celsius | -47.5% |
| 2001 | 0.0922 Degrees celsius | -61.2% |
| 2002 | 0.1416 Degrees celsius | +53.5% |
| 2003 | 0.1186 Degrees celsius | -16.2% |
| 2004 | -0.565 Degrees celsius | -576.4% |
| 2005 | 0.6174 Degrees celsius | -209.3% |
| 2006 | -0.2369 Degrees celsius | -138.4% |
| 2007 | 0.3481 Degrees celsius | -247.0% |
| 2008 | 0.5412 Degrees celsius | +55.5% |
| 2009 | -0.4083 Degrees celsius | -175.4% |
| 2010 | 0.6615 Degrees celsius | -262.0% |
| 2011 | 0.4306 Degrees celsius | -34.9% |
| 2012 | -0.2495 Degrees celsius | -157.9% |
| 2013 | 0.8225 Degrees celsius | -429.7% |
| 2014 | 0.2613 Degrees celsius | -68.2% |
| 2015 | 0.2803 Degrees celsius | +7.3% |
| 2016 | 0.9382 Degrees celsius | +234.7% |
| 2017 | 0.5852 Degrees celsius | -37.6% |
| 2018 | 0.7923 Degrees celsius | +35.4% |
| 2019 | 0.9081 Degrees celsius | +14.6% |
| 2020 | 0.7912 Degrees celsius | -12.9% |
| 2021 | 0.8102 Degrees celsius | +2.4% |
| 2022 | 1.28 Degrees celsius | +58.5% |
| 2023 | 0.6416 Degrees celsius | -50.0% |
| 2024 | 0.4571 Degrees celsius | -28.8% |
| 2025 | 3.96 Degrees celsius | +766.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.0879 Degrees celsius | -0.7764 Degrees celsius | 0.5503 Degrees celsius | 9 |
| 1990s | -0.0757 Degrees celsius | -0.9098 Degrees celsius | 1.15 Degrees celsius | 10 |
| 2000s | 0.0886 Degrees celsius | -0.565 Degrees celsius | 0.6174 Degrees celsius | 10 |
| 2010s | 0.5431 Degrees celsius | -0.2495 Degrees celsius | 0.9382 Degrees celsius | 10 |
| 2020s | 1.32 Degrees celsius | 0.4571 Degrees celsius | 3.96 Degrees celsius | 6 |
More climate change data for Hamilton
- Air temperature, hot days, tropical nights and icing days - Cities 17.65 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 11.2 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 2.16 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 1.02 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 5.95 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 5.87 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from power 0.16 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 0.75 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 8.82 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in Hamilton?
- Air temperature, hot days, tropical nights and icing days - cities in Hamilton was 3.96 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 Hamilton?
- The highest recorded value was 3.96 Degrees celsius in 2025.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in Hamilton?
- The lowest recorded value was -0.9098 Degrees celsius in 1992.
- How does Hamilton rank for air temperature, hot days, tropical nights and icing days - cities?
- Hamilton ranks 158th out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in Hamilton?
- Over the last ten years it is up 1,313.6%. The long-run trend across the full record is volatile.
- Where does this Hamilton 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