You are looking up at a fluffy, billowy cloud in the sky, its soft cotton-like appearance floats effortlessly. It seems light and airy, but if you were to consider the sheer volume of the water vapor contained in that cloud, you should be surprised by its actual weight. Clouds, despite their soft and fluffy appearance, actually weigh quite far more than you might think. But how much does a cloud really weigh? The answer may surprise you.