Diagram of cloud types. High in the atmosphere are cirrocumulus and cirrus. In the middle of the atmosphere are altocumulus and altostratus. In the lower atmosphere are stratocumulus, stratus and cumulus. Cumulonimbus clouds can be found from near the ground up to above 50,000 feet.

Credit: UCAR

There are many different types of clouds, each with an unique shape and location in the sky.  Clouds that form in the troposphere, the lowest layer of the Earth's atmosphere, are typically associated with weather.