SUMMARY
Currently, the climate changes have generated many discussions, constituting one of the major concerns with regard to their effects. Several are the impacts arising from climate change, whether in social, economic and environmental context. Some climate models have shown trends of reduction of rains to the northeast in the wettest months, which could increase the frequency and intensity of droughts and reduce the availability of water resources. Thus, the objective of this work was to analyze the trends and variability of climatological precipitation series in the city of Campina Grande-PB, using daily series of pluvial precipitation over a period of 50 years. The statistical analysis and the preparation of the graphics were made with the ClimAp Software, which have been assessed the extremes of precipitation (days with rainfall = 1 mm; days with rainfall = 10 mm; days with rainfall = 20 mm); Per95p and Pr99p (number of days with precipitation = 95% and the 99%) of significant rainfall, highest rainfall in 1 day rain, annual total and its standardized deviation, monthly and quarterly averages of precipitation, annual total-linear regression, and sequential Mann-Kendall test. Through this research was possible to conclude that the city of Campina Grande presents annual distributions of irregular precipitation, with a slight increase in year-to-year variability, but without statistical significance