A non web based rainfall data base of the South Western Nigeria was designed with the objective of providing user friendly source of data for the region. The study used the rainfall data obtained from the Institute of Agricultural Research and Training, Ibadan and it covers from year 1985 to 2007. The study uses Microsoft Access (2003) for data base creation as well as Visual Basic 6.0 (VB 6.0) for interface creation. The program developed could dynamically accommodate regular and new user of the data and could be upgraded for regular update of the data. The results of the programme evaluation showed that the data obtained from the database and the manual ones are the same.