The model accuracy of the meteoblue multimodel mix (MAE = 1.8 K) (used in the operational forecast) is of similar accuracy as the ERA5 historical reanalysis model (MAE = 1.6 K). The spatial distribution of MAE values for the meteoblue multimodel mix, ERA5, and the reference numerical weather forecast model GFS can be found below. The best accuracy was found in Europe and North America and in low elevated, maritime regions.
A mean absolute error of smaller than 2 K was found for 81 % of the meteorological stations by using the historical reanalysis model ERA5. For 70 % of the meteorological stations the mean absolute error is smaller than 2 K by using the meteoblue multimodel mix, followed by NEMS (53 %) and GFS (43 %).