Which cloud type typically signals fair weather and is often seen on sunny days?

Cumulus clouds are indeed associated with fair weather and are commonly observed on sunny days. They are characterized by their fluffy, white appearance with a flat base and a puffy top, resembling cotton balls. These clouds often form in stable atmospheric conditions where warm air rises and cools, leading to the formation of these distinctive shapes. Cumulus clouds can indicate pleasant weather; they generally begin to form in the morning and often dissipate by evening.

The presence of cumulus clouds usually suggests that the atmosphere is relatively dry and there is not significant weather activity occurring, which is why they are often linked with clear skies and sunny weather. While other cloud types, such as cirrus clouds, may also appear on sunny days, they signify different atmospheric conditions and are typically found at higher altitudes, often indicating changes in the weather rather than stable conditions.