Final answer:
Cumulus clouds are usually white and predict fair to pleasant weather.
Step-by-step explanation:
The type of clouds that are usually white and predict fair to pleasant weather are cumulus clouds.
Cumulus clouds are fluffy and cotton-like in appearance and are typically found on sunny days. They form when warm air rises and condenses into water droplets. These clouds indicate stable atmospheric conditions and are generally associated with fair weather.
Other types of clouds, such as cirrus clouds, are also white in color but are thin and wispy in appearance. Cirrus clouds usually indicate high-altitude moisture but may not necessarily predict fair weather.