These data are made available as part of paper: S. J. Gonzalez-Roji, J. Saenz, J. Diaz de Argandona, G. Ibarra-Berastegi (2020) "Moisture recycling over the Iberian Peninsula. The impact of 3DVAR data assimilation", published in Atmosphere (https://doi.org/10.3390/atmos11010019). The dataset holds selected postprocessed files that allow to reproduce all the results in the paper. Two WRF experiments nested in ERA-Interim were prepared. The first one (N) was configured as in standard numerical downscaling experiments. The second one (D), with the same parameterizations, included a step of 3DVAR data assimilation every 6 hours. The original experiments covered period 2010-2014 after a year of spin-up (2019). However, D was extended until the end of 2018. The following monthly averaged (accumulated for rain) nc files are included: - Qx/Qy: Refer to the zonal and meridional vertically integrated moisture fluxes for the domain. - Rain: Include the accumulated convective and large-scale precipitation output from the model. - SMOIS: Contains the soil moisture of the model runs. - mask: Defines the area where the recycling ratio is calculated over the Iberian Peninsula. - Rho: Holds the recycling ratio at every grid point. The -N- or -D- characters in the file names indicate whether the files come from the WRF N or WRF D experiments.