Method and device for determining numerical weather forecast results

The invention discloses a method and device for determining numerical weather forecast results, relates to the technical field of photovoltaic power generation, and can determine more accurate numerical weather forecast results. The method comprises the following steps: acquiring actually measured data sequences and a historical prediction data set of meteorological parameters in a preset historical time period, wherein the historical prediction data set comprises N historical prediction data sequences obtained from N data sources; determining a target data sequence and other data sequences from the N historical prediction data sequences according to similarity degree parameters of the historical prediction data sequences and the actually measured data sequences; determining dynamic weights of the N data sources based on deviation degree parameters of the other data sequences and the target data sequence; according to the current prediction data set and the dynamic weights of the meteorological parameters in