meteostat collects meteorological data that is made available by both governmental and private organizations. This page contains information on the most important sources used by meteostat.
Monthly long-term climate data at meteostat is based on WorldClim 1.4 (reference period 1960-1990) which was developed by Robert J. Hijmans, Susan Cameron, and Juan Parra, at the Museum of Vertebrate Zoology. WorldClim was generated through interpolation of monthly climate normals from a huge amount of weather stations. Most of the data used by WorldClim is provided by the Global Historical Climatology Network at the National Oceanic and Atmospheric Administration, the Food and Agriculture Organization of the United Nations and the World Meteorological Organization.
Besides that meteostat collects climate data of a wide range of national meteorology administrations including NOAA, DWD, MetOffice and Environment Canada. Data provided by the Climate Data Center (DWD) serves as a basis for station-related data available at meteostat.
Hourly Weather Observations
Hourly measurements are based on METAR reports provided by the National Oceanic and Atmospheric Administration (NOAA). The METAR format contains information on multiple meteorological parameters and is mostly used by pilots. It is managed by the International Civil Aviation Organization (ICAO).
The METAR format was designed to provide an overview of current weather conditions at a specific location. Most measurements included in METAR reports are rounded to integer values.
Hourly history data at meteostat is meant to provide details on the order of meteorological events and is used to complement daily and monthly statistics.
Daily Weather Data
meteostat uses a large database of daily weather summaries made available by the Global Historical Climatology Network of NOAA. Additionally, daily statistics may include estimated data based on hourly observations (SYNOP and METAR data).
Monthly Weather History
Monthly history data is based on CDC data provided by Deutscher Wetterdienst. Furthermore, meteostat calculates monthly averages for some weather stations using daily summaries provided by the Global Historical Climatology Network. Monthly statistics may contain data based on hourly observations (e.g. SYNOP, METAR).
Climate Change Projections
Future climate data is also provided by WorldClim. Originally, the scenarios were created by the Intergovernmental Panel on Climate Change (IPCC) for its fifth Assessment Report (AR5). For the creation of this dataset the IPCC is using global climate models and four representative concentration pathways (RCPs). There are many different models which use these scenarios to calculate actual values. meteostat currently only provides projections of the CCSM4 model. This model is sponsored by the National Science Foundation (NSF) and the U.S. Department of Energy (DOE). The model output was downscaled and calibrated (bias corrected) using WorldClim 1.4 as current climate. More model calculations will be made available at a later point.