Abstract: In a method for determining, in particular predicting, at least one meteorological quantity for describing a current and/or past and/or future weather situation using a data processing device, (a) first meteorological parameters obtained from first measurements are assigned to grid points of a first grid. In the method, (b) at least one setting parameter, which can be entered via an interface, in particular a user interface, is received, and (c) the at least one meteorological quantity is determined from the first meteorological parameters, dependent on the at least one setting parameter, by applying a first algorithm, wherein preferably, the determined meteorological quantity is output at a user interface and/or is transmitted by an electronic message sending device.