Which cloud type typically indicates good visibility?

Cumulus clouds are generally associated with good visibility because they often indicate fair weather and stable atmospheric conditions. These clouds form due to localized heating of the Earth's surface which causes rising air to create fluffy, white masses with a well-defined structure. Typically, they are formed at lower altitudes and have crisp outlines. The presence of cumulus clouds usually means that there is sufficient sunlight and airflow, which contributes to clear visibility.

In contrast, other cloud types mentioned can indicate poorer visibility or specific atmospheric conditions. Stratus clouds, for instance, typically cover the sky like a blanket and can lead to overcast conditions, often producing mist or light rain that diminishes visibility. Nimbostratus clouds are thick and associated with continuous precipitation, which would also result in reduced visibility. Lastly, cirrostratus clouds, although generally thin and high-altitude, can create a halo effect around the sun or moon, which may suggest underlying moisture in the atmosphere, signaling potential changes in weather that could affect visibility.