The data are made available as part of the paper "Sensitivity of precipitation in the highlands and lowlands of Peru to physics parameterization options in WRFV3.8.1", submitted to Geoscientific Model Development. This data set incorporates selected postprocessed files needed to reproduce the results presented in the paper. The files including the monthly means of precipitation for domain 2 (5 km) are named following the same structure: RR-D02-EXPERIMENTNAME-25km3Doms-YYYY_monthly.nc These are the options available in each case: EXPERIMENTNAME: Europe, SouthAmerica, Kenya, Micro13 or NoCumulus. These are the names included in Table 1 from the paper. YYYY: 2008 or 2012. This is only applicable to precipitation. The field means for the northeastern slopes follow this structure: VARIABLE-D02-ERA5-Peru-25-Present-EXPERIMENTNAME-2008.EastLow.fldmean.nc VARIABLE: CLOUDFRA, PW, RH2, RR, SMOIS or T2. This abbreviations represent the following variable from the model respectively: cloud fraction, precipitable water, relative humidity at 2 meters, total precipitation, soil moisture and temperature at 2 meters. EXPERIMENTNAME: Europe, SouthAmerica, Kenya, Micro13 or NoCumulus. These are the names included in Table 1 from the paper. These files contained hourly values so to obtain the monthly means or sums the user must perform the following command: cdo monmean/monsum in.nc out.nc Two .txt files including the information about the stations considered for the validation of the WRF experiments for year 2008 or 2012 are also included. The data is separated with white spaces, and the structure of the columns is the following one: STATION LATITUDE LONGITUDE ELEVATION COUNTRY PROVIDER REGION Finally, two .zip files are provided. Scripts.zip includes all the scripts used to read, process and plot the data from the model, and Namelist_files.zip includes all the namelist files used to run the WRF simulations.