The mean annual rainfall within the Victoria Nile sub-basin is seen to exhibit high inter-annual variation with a vivid increase in the 1960s for most of the stations. Stations in the north eastern part of Uganda are seen to register almost half of the rainfall amounts recorded in the upstream stations, just downstream of Lake Victoria. The upper part of the sub-basin; downstream of Lake Victoria, records mean annual rainfall in excess of 1,300mm whereas the north eastern part of the Sub-basin records about 700mm.