The Kucuk Menderes Basin is important for plant production and today, many temperate fruit species, vegetables and field crops are cultivated commercially in this region. Due to the increase in temperature and the decrease in rainfall, it is likely that the species grown will change. In this study, downscaling models based on artificial neural networks have been established for the average and maximum temperature total precipitation projections of meteorological stations in the basin. These models indicate the possibility that changes in the pattern of the crops that are being cultivated today are compulsory. Some parts of the basin, in which certain vegetables and field crops may have problems growing, will be able to grow these crops without any problems. Conversely, it will not be possible to grow a number of the fruit species that are currently in production.