Abstract This study evaluated the performance of the satellite-based precipitation products PDIR-NOW and PERSIANN-CCS, both part of the PERSIANN system, in representing monthly and seasonal mean precipitation over the municipality of Rio de Janeiro (RJM), Brazil, during the period 2003–2024. The estimates were compared with observational data from the Alerta Rio monitoring network, aiming to assess the ability of these products to reproduce the spatial and temporal variability of precipitation i