Which type of cloud typically indicates fair weather?

The type of cloud that typically indicates fair weather is cumulus. Cumulus clouds are generally fluffy, white, and have a cotton-like appearance. They often form in stable atmospheric conditions where there is enough heat rising from the Earth's surface, allowing for the development of these puffy formations without significant precipitation.

Cumulus clouds are associated with good weather, particularly on sunny days, as they usually do not produce rain. While their presence can indicate some instabilities in the atmosphere leading to potential showers, in most cases, they are seen as a sign of clear and fair weather. Their presence can bring pleasant conditions, making them a familiar sight during beautiful days.

In contrast, other cloud types represent different weather conditions. For example, stratus clouds often cover the sky in a uniform layer and can lead to overcast skies and light rain. Nimbus clouds are associated with precipitation; they typically produce rain or storms. Cirrus clouds, while also indicative of fair weather to some extent, are formed high in the atmosphere and can precede changes in weather due to their association with developing weather fronts. However, cumulus clouds stand out as the classic fair-weather type.