Abstract: In the present study, the meteorological variables including air temperature, solar radiation, wind speed and relative humidity were considered daily. The R2 of ANNs and SVMs models were obtained 0.92 and 0.96, respectively; whereas the efficiency of ANNs and SVMs models were 0.83 and 0.91, respectively. Both ANNs and SVMs approaches work well for the data set used in greenhouse condition, but the SVMs model works better in comparison with the ANNs model.