By Die kalte Sonne It remains difficult with the weather or climate and the reference periods. The German DWD weather service, for example, still finds it difficult to work with the new period 1991-2020 reference and simply cannot say good bye the old 1961-1990 period. Looking back at May 2022, both were used again. According … Continue reading Germany’s DWD National Weather Service Just Can’t Say Good Bye To Old, Cooler 1961-1990 Reference Period