The weight of clouds can vary greatly depending on their size, density, and altitude. On average, a cumulus cloud, which is a typical fluffy white cloud often seen on fair weather days, can weigh anywhere from 1.1 million pounds (500,000 kilograms) to over 110 million pounds (50 million kilograms). Larger clouds, such as towering cumulonimbus clouds associated with thunderstorms, can weigh even more.
Clouds are primarily composed of water droplets or ice crystals suspended in the atmosphere. The weight of these droplets or crystals adds up to the overall mass of the cloud. However, it's essential to note that despite their massive appearance, clouds are not solid objects, so their weight is distributed over a large volume of air.