There are many types of Clouds, but we are only going to tell you about the three (3) main clouds and a few of their sub-types. The three (3) main types are Stratus, Cumulus, and Cirrus. The sub-types of Stratus clouds are Altostratus, and Nimbostratus. Cumulus sub-types are Cumulonimbus, and Altocumulus. There is only on sub-type of Cirrus clouds which is Cirrocumulus. There is also one other type of cloud that everyone has heard of and have most likely seen, which is fog.