Average cloud weight refers to the total mass of water droplets contained in a cloud. On average, a cumulus cloud can weigh about 1.1 million pounds (500,000 kilograms). This weight comes from the tiny water droplets that make up the cloud, which can number in the millions. The weight of a cloud is significant because it helps explain how clouds can produce precipitation. When the droplets combine and grow larger, they eventually become heavy enough to fall as rain, snow, or other forms of precipitation, impacting weather patterns and the environment.