How much do clouds weigh? Simple enough question with a simple enough answer, right? It should be practically nothing, after all they are floating high up in the sky. But the answer is not as simple as many would believe, and they weigh a lot, a real lot. Clouds weigh so much in fact that it would take a hell of a lot of freight trains to equal the weight.
All clouds contain water vapor. The most common type of cloud is the cumulus cloud. They are the ones that appear to be cotton like or puffy. These clouds rarely produce any precipitation, yet they are full of water. So we will use this most common cloud as the basis of the question, how much do clouds weigh?