Air temperature, hot days, tropical nights and icing days - Cities in Nagano
Nagano: Air temperature, hot days, tropical nights and icing days - Cities was 2.94 Degrees celsius in 2025. ◆ Volatile
Air temperature, hot days, tropical nights and icing days - Cities in Nagano, 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 Nagano is 2.94 Degrees celsius, measured in 2025. That is the highest value across all 45 years on record.
Compared with earlier readings it is up 45.8% on the previous year and up 205.6% over ten years.
Over the whole period, air temperature, hot days, tropical nights and icing days - cities in Nagano peaked at 2.94 Degrees celsius in 2025 and was at its lowest, -1.33 Degrees celsius, in 1981.
Nagano ranks 242nd 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 Nagano, year by year
| Year | Degrees celsius | Change |
|---|---|---|
| 1981 | -1.33 Degrees celsius | — |
| 1982 | -0.3146 Degrees celsius | -76.3% |
| 1983 | -0.6042 Degrees celsius | +92.1% |
| 1984 | -1.1 Degrees celsius | +81.6% |
| 1985 | -0.2222 Degrees celsius | -79.8% |
| 1986 | -0.9342 Degrees celsius | +320.5% |
| 1987 | 0.2051 Degrees celsius | -122.0% |
| 1988 | -0.9542 Degrees celsius | -565.2% |
| 1989 | 0.2117 Degrees celsius | -122.2% |
| 1990 | 0.9118 Degrees celsius | +330.7% |
| 1991 | 0.336 Degrees celsius | -63.2% |
| 1992 | -0.1818 Degrees celsius | -154.1% |
| 1993 | -0.6354 Degrees celsius | +249.5% |
| 1994 | 0.4882 Degrees celsius | -176.8% |
| 1995 | -0.7653 Degrees celsius | -256.8% |
| 1996 | -0.7533 Degrees celsius | -1.6% |
| 1997 | -0.0586 Degrees celsius | -92.2% |
| 1998 | 0.895 Degrees celsius | -1628.3% |
| 1999 | 0.2789 Degrees celsius | -68.8% |
| 2000 | 0.2237 Degrees celsius | -19.8% |
| 2001 | -0.1646 Degrees celsius | -173.6% |
| 2002 | 0.1173 Degrees celsius | -171.3% |
| 2003 | -0.012 Degrees celsius | -110.2% |
| 2004 | 1.18 Degrees celsius | -9921.5% |
| 2005 | 0.1577 Degrees celsius | -86.6% |
| 2006 | 0.4772 Degrees celsius | +202.6% |
| 2007 | 0.7831 Degrees celsius | +64.1% |
| 2008 | 0.4417 Degrees celsius | -43.6% |
| 2009 | 0.6189 Degrees celsius | +40.1% |
| 2010 | 0.7006 Degrees celsius | +13.2% |
| 2011 | 0.1241 Degrees celsius | -82.3% |
| 2012 | -0.0149 Degrees celsius | -112.0% |
| 2013 | 0.3335 Degrees celsius | -2340.7% |
| 2014 | -0.1093 Degrees celsius | -132.8% |
| 2015 | 0.9637 Degrees celsius | -982.0% |
| 2016 | 1.28 Degrees celsius | +32.5% |
| 2017 | -0.0194 Degrees celsius | -101.5% |
| 2018 | 1.26 Degrees celsius | -6616.2% |
| 2019 | 1.13 Degrees celsius | -10.5% |
| 2020 | 1.32 Degrees celsius | +16.7% |
| 2021 | 1.04 Degrees celsius | -21.5% |
| 2022 | 0.9516 Degrees celsius | -8.1% |
| 2023 | 1.86 Degrees celsius | +95.9% |
| 2024 | 2.02 Degrees celsius | +8.3% |
| 2025 | 2.94 Degrees celsius | +45.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -0.5596 Degrees celsius | -1.33 Degrees celsius | 0.2117 Degrees celsius | 9 |
| 1990s | 0.0516 Degrees celsius | -0.7653 Degrees celsius | 0.9118 Degrees celsius | 10 |
| 2000s | 0.382 Degrees celsius | -0.1646 Degrees celsius | 1.18 Degrees celsius | 10 |
| 2010s | 0.565 Degrees celsius | -0.1093 Degrees celsius | 1.28 Degrees celsius | 10 |
| 2020s | 1.69 Degrees celsius | 0.9516 Degrees celsius | 2.94 Degrees celsius | 6 |
More climate change data for Nagano
- Air temperature, hot days, tropical nights and icing days - Cities 11.09 Degrees celsius (2025)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 11.64 Degrees celsius (2060)
- Climate projections by scenario, 2030–2060 – Cities and FUAs 1.95 Degrees celsius (2060)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from 0.05 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 0.17 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 power 0.05 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions from road 0.54 Tonnes of CO2-equivalent (2024)
- Greenhouse gas emissions - Cities and FUAs — GHG emissions total 1.14 Tonnes of CO2-equivalent (2024)
Frequently asked questions
- What is air temperature, hot days, tropical nights and icing days - cities in Nagano?
- Air temperature, hot days, tropical nights and icing days - cities in Nagano was 2.94 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 Nagano?
- The highest recorded value was 2.94 Degrees celsius in 2025.
- What is the lowest air temperature, hot days, tropical nights and icing days - cities recorded in Nagano?
- The lowest recorded value was -1.33 Degrees celsius in 1981.
- How does Nagano rank for air temperature, hot days, tropical nights and icing days - cities?
- Nagano ranks 242nd out of 1314 regions with data for 2025.
- Is air temperature, hot days, tropical nights and icing days - cities rising or falling in Nagano?
- Over the last ten years it is up 205.6%. The long-run trend across the full record is volatile.
- Where does this Nagano 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