The historical weather data from 1896 to 1955 complete the long-term series of measurements of the weather data of Bad Lauchstädt. Values are available for air temperature and precipitation as pentad values (sum values of 5 days). Unfortunately, the exact origin of the data, as well as the measurement method and the quality of the data cannot be described. The data were digitalized on basis of original records of the experimental station and documents of the Central Office of the German Meteorological Service [Deutscher Wetterdienst] (see reference Hoffmann et al.).The data were checked for plausibility, but a residual uncertainty still remains. Nevertheless, the data represent an important contribution to a complete weather description at the site of Bad Lauchstädt. With the help of these data, evaluations and modelling of long-term experiments are possible.