The first weather recordings in Wiesbaden began as early as 1842 and have continued, with brief interruptions, to this day. The series of measurements recorded represent the temperature curve, the long-term trend and the deviations of the annual mean temperature from the long-term average. Based on the 147-year measurement series, an increase in mean temperatures over the last 15 years is clearly recognizable. This corresponds to the general trend of rising temperatures in Germany.