The TRMM-3B43 product provides monthly rainfall data estimated by remote sensing. These data can be useful in hydrological applications, climate studies and water resources management. However, it is necessary to evaluate their uncertainties in relation to surface measurements, in order to validate the usefulness of these estimates. The objective of this work is to analyze, in a spatial and temporal way, the degree of coherence between the TRMM-3B43 product and pluviometric stations of the state of Espírito Santo. For this, the mean error, root mean square error (RMSE) and Pearson''s linear correlation were used. The results showed that, in general, the TRMM-3B43 product presented good precipitation estimates for the state of Espírito Santo, with low average error and RMSE and high linear correlation. Regions with lower mean rainfall presented lower RMSE and higher correlation. The TRMM overestimated regions where the mean rainfall is higher and underestimated regions with lower mean rainfall.