Cumulus clouds are the pretty, white, puffy mid-level clouds that often seen on a warm summer day. Children like to look for shapes of animals in these clouds. By themselves, there is not enough moisture to produce any precipitation. White clouds ususally don't make rain or snow. These clouds form due to rising warm air which contains moisture (water vapor), as the water cools in the higher atmosphere, it condenses to form minute water droplets which can be seen as a cloud.