What primarily influences cloud formation?

Cloud formation is primarily influenced by humidity and temperature. When humid air rises, it cools as it goes higher into the atmosphere. As the air cools, its capacity to hold moisture decreases, leading to condensation of water vapor into tiny droplets—this process creates clouds.

Temperature plays a crucial role, as warm air can hold more moisture than colder air. Thus, the combination of high humidity and the right temperature conditions are critical for effective cloud formation. Areas with high humidity and rising warm air are conducive to clouds developing.

While other factors like wind speed and pressure or even sunlight are important in the broader context of weather, they do not directly influence the fundamental process of cloud formation as significantly as humidity and temperature do. Similarly, soil moisture and vegetation might impact local weather, but they are not primary drivers of cloud creation.