This work has done using the HadCM3 General Circulation Model (GCM) and Statistical downscaling model (SDSM) was used as a tool to downscale the climate change projection over the Central Oromia of Ethiopia. It has been found that both the rainfall and temperature is projected to increase in the next century (till 2100) however there are places which shows a decrease of rainfall in the projected climate for instance most central part of Oromia ( Meisso) rainfall tend to increase by 3%,2% and 1% by 2020's, 2050's and 2080's. These areas will be more susceptible for worsens impact of climate change because the declination of rainfall was accompanied by increase of temperature. Meanwhile the future climate is becoming more variable that it was ever been before and new records of weather are expected. Specifically days and night will become hotter than ever.