The study compares the precipitation amount in the Warri and Port Harcourt metropolitan areas of Nigeria. To do this, the study adopted a field survey of the two cities where precipitation data were obtained from the archive of the Nigerian Meteorological Agency from 1953-2014, and rain gauges were placed in the six existing land use types in these metropolitan areas for 2015. Precipitation data were obtained from the various landuses in these areas. The data were presented with statistical diagrams and analyzed with paired t test. The results of the study showed high and heavy precipitation amount with annual precipitation of 2360mm in Port Harcourt; and 3125mm in Warri, and these indicate that precipitation in Warri metropolis were generally higher than those of Port Harcourt metropolis. The study also revealed 33% and 20% urban influence on the precipitation of the built-up areas than those of the surrounding rural areas of Warri and Port Harcourt metropolitan areas of Nigeria. This is ascribed by the increased in the socio-economic activities (SEA) and anthropogenic activities of the residents of Warri over that of Port Harcourt. The increased precipitation in these cities has triggers adverse environmental and socio-economic effects on the residents and government of Nigeria, as such individual, private organizations and government should plan with the precipitation characteristics as they carried out their routine activities annually.