Which type of cloud is often taken to be a sign of fair weather?

A. Cumulus

B. Altostratus

C. Stratus

D. Nimbostratus

Cumulus is the type of cloud is often taken to be a sign of fair weather. Cumulus clouds are puffy clouds that sometimes look like pieces of floating cotton. The base of each cloud is often flat and may be only 1000 meters (3300 feet) above the ground. The top of the cloud has rounded towers.