A computer-implemented method for validating data provided by a rain gauge, the method comprising steps of: - receiving, in a defined time window, pluviometric data from a gauge and weather data from at least one weather radar; - computing a coefficient of gauge/radar similarity between the pluviometric data received from said gauge and the weather data received from said at least one weather radar; - comparing the value of the coefficient of obtained gauge/radar similarity to a threshold gauge/radar value - if the value of the coefficient of gauge/radar similarity is lower than the gauge/radar threshold value: - identifying in a given geographical area, a set of neighbouring gauges of said gauge; - determining among the neighbouring gauges those belonging to a same rain cell as said gauge, a rain cell grouping together gauges whose meteorological data received from said at least one radar at the positions of these gauges are similar during said time window; - calculating a coefficient of gauge/gauge similarity between the rainfall data of said gauge and the rainfall data of each of the neighbouring gauges belonging to the same rain cell; - aggregating the results of the calculations of the gauge/gauge similarity coefficient to obtain a coefficient of gauge/gauge similarity value; - comparing the value of the coefficient of gauge/gauge similarity obtained with a gauge/gauge threshold value; and - validating the rainfall data from said gauge if the value of the gauge/gauge similarity coefficient is greater or equal to the gauge/gauge threshold value. - receiving, in a defined time window, pluviometric data from a gauge and weather data from at least one weather radar; - computing a coefficient of gauge/radar similarity between the pluviometric data received from said gauge and the weather data received from said at least one weather radar; - comparing the value of the coefficient of obtained gauge/radar similarity to a threshold gauge/radar value - if the value of the coefficient of gauge/radar similarity is lower than the gauge/radar threshold value: - identifying in a given geographical area, a set of neighbouring gauges of said gauge; - determining among the neighbouring gauges those belonging to a same rain cell as said gauge, a rain cell grouping together gauges whose meteorological data received from said at least one radar at the positions of these gauges are similar during said time window; - calculating a coefficient of gauge/gauge similarity between the rainfall data of said gauge and the rainfall data of each of the neighbouring gauges belonging to the same rain cell; - aggregating the results of the calculations of the gauge/gauge similarity coefficient to obtain a coefficient of gauge/gauge similarity value; - comparing the value of the coefficient of gauge/gauge similarity obtained with a gauge/gauge threshold value; and - validating the rainfall data from said gauge if the value of the gauge/gauge similarity coefficient is greater or equal to the gauge/gauge threshold value. - identifying in a given geographical area, a set of neighbouring gauges of said gauge; - determining among the neighbouring gauges those belonging to a same rain cell as said gauge, a rain cell grouping together gauges whose meteorological data received from said at least one radar at the positions of these gauges are similar during said time window; - calculating a coefficient of gauge/gauge similarity between the rainfall data of said gauge and the rainfall data of each of the neighbouring gauges belonging to the same rain cell; - aggregating the results of the calculations of the gauge/gauge similarity coefficient to obtain a coefficient of gauge/gauge similarity value; - comparing the value of the coefficient of gauge/gauge similarity obtained with a gauge/gauge threshold value; and - validating the rainfall data from said gauge if the value of the gauge/gauge similarity coefficient is greater or equal to the gauge/gauge threshold value.