Comparison of the spatial rainfall in The South in Thailand by spatial interpolation techniques aims to evaluate spatial interpolation techniques and compare different rainfall interpolation methods to produce spatial rainfall estimates. The interpoluation methods used in this study were inverse distance weighting, kriging, Co-kriging and thiessen polygon. Daily rainfall data from 209 rain gauges. Selection precipitation data by Double Mass Curve method and cutting the graph is not a straight line. The remaining stations are taken into consideration in 144 stations and used to estimate rainfall in November, 2010 and March, 2011. The accuracy of estimations was assessed through basic statistics, such as mean error (ME), Mean Absolute Error (MAE) and root mean square error (RMSE). Inverse Distance Weighting have performed the lowest RMSE in The south in Thailand and ME have provided negative value that is over estimate rainfall. Co-Kriging have produced more accurate predictions than another methods in The south in Thailand and mean error have been showing that the value is over estimate rainfall.