“Wetter Messen Alle 16 Tage” (which means “climate measured each 16 days” in English) is a climate forecasting approach primarily based on the synodic interval of the Moon. It originated in Germany and gained recognition within the 18th century.
The approach 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 information over a interval of a number of years, it was believed that one may establish patterns and make predictions about future climate situations.
