But it still knows how to change back into a sun in the daytime. Some people can tell what time it is by looking at the sun. But I have never been able to make out the numbers. I am not sure how clouds get formed. But the clouds know how to do it, and that is the important thing.
Clouds just keep circling the earth around and around.
There is not much else to do. Water vapor gets together in a cloud. When it is big enough to be called a drop, it does. Humidity is the experience of looking for air and finding water. Isotherms and isobars are even more important than their names sound.