Assessment of Impacts of climate variability in Kilosa District, Morogoro Region in Tanzania Scientist. Gerald Mrema. PRECS M&C LTD, P.O. Box 10268, Dar es Salaam, Tanzania *Corresponding Author (Tel: +255714254900 e-mail: mrema.gerald@gmail.com) Abstract This research is basically on assessment of impacts of climate variability in Kilosa District Morogoro Region in Tanzania were the field study was done within three wards that is Ulaya, Kilosa town and Rudewa represent three major zones of Kilosa District that is highlands, midlands and lowlands respectively. Methodologies that were used in field study include physical observation, consultation, interview through research question, literature review and GIS in map updating. Data from Tanzania meteorological agency (TMA), WAMI/RUVU basin and Morogoro agriculture department of rainfall and temperature, water level and water discharge also crop production respectively for 30years from 1980 to 2010 were analyzed statistically in order to show the link between climate variability with its associated impacts in both people and environment at large, results shows that climate variability in Kilosa District generally is of both dry and wet years in different years where the area also experience both MAM and OND seasons of rainfall per year. Also results have revealed that the total annual rainfall at Kilosa is observed to decreases at the rate of 8.04mm/year while in temperature there a slight increase at a rate of 0.1oC/year in temperature amount, also results of questionnaires show that a good number of people 78% are aware of the decrease in rainfall amount while 16% are aware of its increase and 6% says there are no changes in climate variability, the change in both rainfall and temperature amount is associated with different human practice. Also the results have reveled among extreme weather event which are associated