Precipitation - Cities and FUAs — Extreme precipitation days by country
This dataset provides indicators of total precipitation and extreme precipitation days in Functional Urban Areas (FUAs) and cities. Data sources and methodology The indicators use ERA5-Land data. Total precipitation is the sum of all liquid and frozen water—such as rain and snow—that reaches the Earth's surface...
What the numbers show
Precipitation - Cities and FUAs — Extreme precipitation days is currently reported for 2 countries. The highest value is 112.44 Days per year in Armenia; the lowest is 8.67 Days per year in Luxembourg.
The median across all reporting countries is 60.56 Days per year, and the mean is 60.56 Days per year.
The gap between the highest and lowest reporting country is a factor of about 13.
Over the past decade 1 countries rose and 1 fell. The largest increase was in Luxembourg (up 92.6%), and the largest decrease in Armenia (down 18.3%).
Precipitation - Cities and FUAs — Extreme precipitation days: full country ranking
| # | Country | Latest | Year | 10-year change | Trend |
|---|---|---|---|---|---|
| 1 | Armenia | 112.44 Days per year | 2024 | down 18.3% | falling |
| 2 | Luxembourg | 8.67 Days per year | 2024 | up 92.6% | volatile |
Regions and income groups
Aggregates are excluded from the country ranking above so that a region can never outrank a country.
- Santa Rosa de Cabal 279.66 Days per year
- Braga 31.33 Days per year
- Pereira 243.19 Days per year
- Treviso 24 Days per year
- Manizales 199.17 Days per year
- Sacramento 15.65 Days per year
- Guadalajara de Buga 197.55 Days per year
- Porto 14.73 Days per year
- Buenaventura 176.22 Days per year
- Santiago 11.65 Days per year
- Palmira 147.7 Days per year
- Coimbra 9.4 Days per year
- Quibdó 132.06 Days per year
- Valparaíso 7.74 Days per year
- Fusagasugá 125.75 Days per year
- Nantes 5.5 Days per year
- Tuluá 119.11 Days per year
- Toledo 3.33 Days per year
- Cartago 113.71 Days per year
- Bucaramanga 99.84 Days per year
- Ciénaga 77.28 Days per year
- Santa Marta 63.33 Days per year
- Shizuoka 53.96 Days per year
- Fujieda 53.57 Days per year
- Cali 53.27 Days per year
- Ocaña 50.22 Days per year
- Popayán 49 Days per year
- Bergen 48.8 Days per year
- San Andres de Tumaco 48.58 Days per year
- Toyama 47.31 Days per year
- Fuji 47.08 Days per year
- Girardot 46.33 Days per year
- Puerto Montt 46.27 Days per year
- Aguachica 45.82 Days per year
- Hamamatsu 45.62 Days per year
- Numazu 44.4 Days per year
- Barrancabermeja 42.18 Days per year
- Kochi 40.57 Days per year
- Tapachula 40.39 Days per year
- Vancouver 40.01 Days per year
About this data
This dataset provides indicators of total precipitation and extreme precipitation days in Functional Urban Areas (FUAs) and cities. Data sources and methodology The indicators use ERA5-Land data. Total precipitation is the sum of all liquid and frozen water—such as rain and snow—that reaches the Earth's surface each year. It excludes fog, dew, and any precipitation that evaporates before reaching the ground. Extreme precipitation days are defined as days with more than 20 mm of total precipitation. 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 (Precipitations - 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