Impact of aging, precipitation, and orientation on performance of radiative cooling for building envelope: A field investigation

•Effect of aging, precipitation, and orientation on radiative cooling is tested.•Shortwave reflectivity decreases from 0.94 to 0.81 in the natural aging test.•Radiative cooling effect in field decreases with time due to dust accumulation.•Precipitation compromises the cooling effect of the radiative cooling coating.•Cooling effect in the horizontal direction is better than on vertical surfaces.