Where did the rain come from. I swore, the last couple that hit San Diego was a complete surprise to me. One day it’s beautiful out and the next morning…rain. When I woke up and heard the rain coming down I knew it was a good opportunity to wash the car and save the hassle of having to dry it. Although the neighbors may think you are a lunatic, washing your car during the rain means that the rise you get from mother nature will dry spot free saving you some time and effort.