This study was conducted to investigate the daily rainfall variation the seasonal over Thailand with APHRODITE's Water Resources data (Yasutomi,et.al., 2011) version V1101 during the period 1951-2007 in the spatial resolution is .
By using Empirical Orthogonal Functions (EOF) analysis explain on Sea Surface Temperature (SST) variability and rainfall variability over Thailand with Niño index (sea surface temperature (SST) anomalies in the Niño region)