This dataset contains simulated daily accumulated total precipitation (convective and non-convective) for the Atacama Desert, generated using the Weather Research and Forecasting (WRF) Model. The simulation represents a high-resolution regional precipitation dataset from the dynamic downscaling of ERA5 data, using a higher-resolution climate model. The dataset spans the years 1990 to 2020, providing a horizontal resolution of 6 km and is stored in NetCDF format. The time indicated represents the end of the accumulation period in UTC. A single one-way nesting was performed using ERA5 as initial and boundary conditions within the domain 26-16°S and 67-74°W. The WRF Model simulation is initially output as 3-hourly data. Further, 3-hourly total precipitation (convective plus non-convective rainfall) is accumulated into daily precipitation. Other initial and boundary conditions include land use and soil categories (USGS 24 categories), vegetation fraction and LAI (monthly MODIS climatology), and sea surface temperature (ERA5, provided by HadISST2 prior to September 2007 and OSTIA as per Dee et al., 2011). For physical parameterizations used in WRF, please refer to Reyers et al. (2021).