“Wetter Messen Alle 16 Tage” (which means “climate measured each 16 days” in English) is a climate forecasting method based mostly on the synodic interval of the Moon. It originated in Germany and gained reputation within the 18th century.
The method depends on the concept climate patterns are likely to repeat themselves in a 16-day cycle, equivalent to the time it takes for the Moon to finish one orbit across the Earth. By observing and recording climate knowledge over a interval of a number of years, it was believed that one might establish patterns and make predictions about future climate situations.
