For precipitation to form and fall, there must be clouds—precipitation never falls from a clear blue sky. However, not all clouds produce precipitation. … Clouds produce rain when tiny droplets of liquid water begin to stick together, forming larger and larger drops. When those drops get heavy enough, they fall as rain.

Do cumulus clouds produce rain?

Cumulus clouds may appear by themselves, in lines, or in clusters. … Normally, cumulus clouds produce little or no precipitation, but they can grow into the precipitation-bearing congests or cumulonimbus clouds.

What are the four types of rainfall?

• Convectional rainfall.
• Orographic or relief rainfall.
• Cyclonic or frontal rainfall.