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This work shows the importance of rain gauge network analysis in the determination of the number of rain gauges that will accurately estimate the mean rainfall of an area. This research therefore looked at the two design approaches viz weighted and non-weighted approaches that will best estimate the number of rain gauges required in a catchment area. From this, it was established that the 87 existing and operating rain gauges in Nigeria is grossly inadequate and hence the need to improve thefatcat:bcfvdwfdrbexjfbwriklqrzn54