A childhood belief about people

My mother told me rain at a funeral meant that God was taking that person to heaven. I thought it was a well known "thing" and convinced myself of it because most film and T.V. funerals have rain. It wasn't until my grandmothers recent funeral when I pointed out that it was raining that she told me she had made it up for me and my siblings when it had rained at my grandfathers funeral ten years earlier.