The wetter areas in Singida region are along the escarpment near Kiomboi in Iramba district and in the south-west of Manyoni district near Rungwa, where the long-term mean annual rainfall exceeds 800 mm. The mean annual rainfall is in the range of 600 mm to 800 mm over large areas of Iramba and Singida districts. On the eastern side of Manyoni district near the Bahi Swamp and the Rift Valley depression of Mgori and Shelui divisions lies the drier area in the region where the mean annual rainfall is less than 550 mm. The regional mean annual average rainfall is 700 mm.