Clouds are classified into four basic categories, depending largely on the height of their bases above the ground. High-level clouds, called cirrus clouds, can reach heights of 20,000 feet (6,000 meters) and are typically thin. They do not produce rain and often indicate fair weather. They are usually made up of ice.
Similarly one may ask, do clouds have weight?
According to scientists, the weight of the average cumulus cloud is 1.1 million pounds! Think about that for a moment. This means that at any given moment, there are millions of pounds of water floating above your head. That's the equivalent of 100 elephants.
Are clouds lighter than air?
Maybe clouds “float” for the same reason that helium balloons float. Maybe they are lighter than air. That can't be true because we know that clouds are made of water. Water is not lighter than air - water does not float.
How do clouds not fall down?
The downward gravitational force on the cloud droplets is balanced by the upward force by rising air from below. In a bulk sense, the cloud itself is lighter than the air it occupies, so it is buoyant. Although, in a sense clouds do fall. It's called rain.