In the last years, Brazil has been affected by natural hazards such as flooding and slope failures. Most of the registered slope failures are related to intense pluviometric events. Though different factors must be considered in promoting slope instability, as geological, structural and hydrogeological conditions, topography, among others, pluviometric thresholds are defined, for specific areas, in order to understand the relation between rainfalls and slope failures. The pluviometric thresholds are determined by empirical models based on real antecedent rainfall data and real slope failure occurrences in an area, with the objective to delineate zones where specific volumes of rainfall lead to slope instability. Studies of this kind can be very useful to the creation of alarm systems and mitigation plans. This study aimed to elaborate pluviometric thresholds with different scenarios for the BR-376 Highway, between km 644 to km 680 in the state of Paraná, Brazil. The pluviometric thresholds, defined for the study area, were based on the distribution of six rain gauges and its historical data from 2014 to 2018, alongside real slope failures in the BR-376 Highway. There was obtained one threshold per rain gauge and two different settings according with the hydrographic basins in the area. The pluviometric thresholds are a useful tool to the geotechnical risk management of the highway and can be validated and adjusted with the enhancement of rainfall and landslides data.