In this work, we analyze the pluviometric annual series of five meteorological stations located in the Colombian coffee zone in order to determine the importance of the analysis of climatic change scenarios regarding climatic variability scenarios. The results show that, in the analyzed stations, annual rainfall does not exhibit meaningful changes in time. There is no remarkable trend in the series; whereas the climatic variability associated to the El Nino Southern Oscillation (ENSO) explains the behavior of the annual series to a great extent. In relation to this, we observed a strong relation between the annual average value of the index that characterizes both ENSO phases and annual rainfall, and also between such index and the number of rainfall days per year. Besides, a cycle that defines a strong periodicity of 16 years is detected, which can be associated with the most severe dry and rainy events of the last years. In this sense, from a practical viewpoint, the annual rainfall variability scenarios are more important.