This dataset corresponds to a study aimed at investigate the parameters influencing the design of a test box used to evaluate the performance of Daytime Radiative Cooling (DRC) materials. The files of the data set correspond to time series for several days in summer showing the evolution of temperature on the surface of the DRC material or the air gap between the surface and the windshield. Each file corresponds to a particular parameter, which is studied in a side-by-side methodology. Each file is associated to a figure of the paper "Experimental Investigation of Parameters Influencing Test Box and Material Behavior in Daytime Radiative Cooling Measurements".