Solving the energy balance at the atmosphere-subsurface interface drives heat input (in the summer) into the subsurface. We use this subsequently to calculate heat transport and water flow into the subsurface and then to calculate temperature s around drinking-water supply pipes. This data is from the weather station of the University of Stuttgart. We are providing the measured Boundary Conditions, needed to compute the interface boundary conditions: long wave radiation incoming short wave radiation incoming air temperature in 2 m above ground wind velocity in 2 m above ground relative humidity in 2 m above ground precipitation intensity Data is given tabulated, a readme-file explains the column names.