Daily data from 203 pluviometric stations, located in the Southeast region of Brazil (SEB), were used in order to analyze, statistically, the influence of the La Niña (LN) phenomenon, in the threemonthly rainfall regime during the rainy season (RS). The series related date at the beginning of the rainy station in years of occurrence of the climatic phenomenon, were classified, based on their medium, maximum and minimum value. The analysis of the influence of LN phenomena at the end of the rainy season was accomplished by using the quantis technique, for nine areas of SEB defined previously. The amount of threemonthly precipitation, was classified and correlated with the Southern Oscillation Index (SOI) and the sea surface temperature (SST) of four regions of the Equatorial Pacific, with the application of the normalized deviations and correlations with 'discrepancy', respectively. The conclusion was that during LN event, the RS tends to increase, in the SP2 area. However, in the general context, the climatic phenomenon didn't influence the beginning of the rainy season of the SEB, while, the expressive precipitation anomalies, observed mainly from the period November-January, were little correlated with the behavior of SST of Equatorial Pacific and, or, SOI.
La Niña; precipitation; Southeast of Brazil
