Occasional storms can produce very heavy rainfall . In one day in June 1975 , Nimmitabel received 256 millimetres ( over 10 inches ) of rain . Annual rainfall ranges from 430 millimetres ( 17 inches ) around Dalgety to 700 millimetres ( 26 inches ) at the eastern edge of the plateau , where occasional cyclonic storms can produce extremely heavy rainfall - in one day in June 1975 Nimmitabel received 256 millimetres ( over 10 inches ) of rain .