This dataset accompanies the paper titled "Diffusion and velocity correlations of the phase transitions in a system of macroscopic rolling spheres". It includes a summary table (experiment_properties_diffussion.dat) with the recording, air velocity and packing fraction parameters plus the value of the average temperature field and the diffusion coefficients and exponents calculated by means of the method described in the manuscript. We also include the detected trajectories for the experiments shown in Figures 2, 3 and 4 and a video corresponding to the experiments presented in Figure 2. File names are preceded by an experiment_id, one can look up in the table the parameters corresponding to each experiment_id. We can provide the rest of trajectory files upon request.