A method for predicting a weather condition at a particular location in a road network extending over at least one weather area divided into a plurality of weather cells, the method including steps of obtaining, from a weather forecast provider, a first data item relating to a general weather forecast for the weather area, and receiving, from a first vehicle travelling in a first weather cell, a second data item relating to an alteration of a weather condition detected by at least one sensor of the vehicle. The prediction method is remarkable in that it further includes steps of predicting a probability of a weather condition for at least one target weather cell by applying a prediction model associated with the target cell to at least the first data item and the second data item, and of transmitting the predicted weather condition to at least one second vehicle.