The study is studied forecasts of precipitation and temperature values using general circulation models of the atmosphere in the period 2021-2050. Climate data was taken such as rainfall and average temperature of the Meteorological Organization. To prepare for future climate scenarios was used from general circulation model HadCM3 outputs under the A2 emissions scenario. Due to the low resolution general circulation models of small-scale model of SDSM4.2 use and climate changes in precipitation and temperature parameters were simulated mean for future periods. In this study, the model was calibrated SDSM, the 26 large-scale climatic parameters (NCEP) an average of 3 parameters most correlated with mean temperature and 6 parameters are most correlated with average rainfall Seymare basin. The results showed that the predicted climatic parameters for the simulation of climate parameters with high accuracy, but the average temperature of rainfall is less accurate. This is due to normal lack and unconditional of rainfall data. The results indicate that the average temperature of the area in the period 2050-2021 compared to the observation period (2008-1979) has been facing increasing 1.7 ° C and average rainfall areas showed a decrease of 47%.