Data, metadata and code for paper published in Earth System Science Data: A high density observational dataset of daily precipitation and air temperature for the Extended Alpine Region Code (working copy all written in R statistical software): scripts.zip to read and process data in from different sources to perform intra and inter-stations quality control to perform break detection and homogenization to read results of quality control and homogenization Data: Daily time series of air temperature (mean, minimum and maximum) and precipitation as .zip files, grouped by data provider. Information on column content is provided in separate files "data_readme.txt" about 10000 stations from Italy, France, Switzerland, Austria, Germany, Slovenia, Croatia, Bosnia-Herzegovina, Czech Republic, Slovakia and Hungary Meta data (code, name, longitude, latitude, elevation, measurements availability for each variable, starting date, ending date) in "metadata.zip", including a file for each data provider If you use the data you agree to adhere to the respective data provider's terms as listed in "License.pdf" The license terms especially (and additionally to any other terms of the single data providers) include: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. [from CC BY 4.0] Version history: v1.0: initial upload v2.0: update of data policies; addition of France and Croatia time series