This page provides an overview of the data sources used by meteostat. Our import routines process data from multiple governmental sources. The key data providers include the national weather service of Germany (DWD), the National Oceanic and Atmospheric Administration (NOAA) and Environment Canada.
To start off with, the truth is a relative value - even in meteorology. For instance, observations and derived sums and averages can differ regarding measurement interval or the used rounding method. meteostat collects data by various organizations and provides data redundantly. Thus, it is possible that the average temperature of a certain week differs depending on the usage of daily or hourly data. One possible reason for this could be that the daily summaries were calculated using higher-detailed data (e.g. 10-minutely observations). The World Meteorological Organization (WMO) has formulated standards for the location of weather stations and the way observations are made. Our weather stations usually meet the requirements of the WMO.
Hourly observation data is mainly provided by NOAA and the national weather service of Germany. More specifically, we are using METAR reports and synoptic observations for hourly weather data. The hourly data basis is complemented with “MOSMIX” model data available for more than 4,000 weather stations. Archived nowcast predictions may be used as a substitute for missing weather history data. However, “MOSMIX” data is not considered for daily aggregations.
Aggregated Daily Data
Daily weather data at meteostat is provided by NOAA’s Global Historical Climatology Network (GHCN). Furthermore, meteostat aggregates daily statistics from hourly weather data. Keep in mind that our data is subject to fluctuations due to variant aggregation and rounding methods.
The climate data available at meteostat is based on actual measurements taken by the respective weather station and usually refers to a 30-year period ("reference period"). meteostat obtains this data from the Climate Data Center (CDC) operated by DWD and publications of other national weather services. Additionally, we use the meteostat database for extending our data in this category. Furthermore, climate data is being used for the calculation of anomaly data.
We constantly strive to further improve our products and services. meteostat handles large amounts of data provided by different sources day after day. Therefore, errors occur from time to time and gaps in our archives cannot always be prevented. Please get in touch with us if you have any questions or feedback.