Do Raindrops Form Around Dust?

Raindrops begin forming when water vapor condenses on micrometer-sized particles of dust floating in the atmosphere. The dust particles grow to millimeter-sized droplets, which are heavy enough to begin falling.

Does rain need dust to fall?

Raindrops and snowflakes require dust in the atmosphere in order to form because it requires less energy for water or ice to bond to a particle, than to form on their own.

Can raindrops form without dust?

Every drop of rain gets created because of dust. And since it is impossible for rain to form without dust particles, every raindrop has some impurities. But it's not just dust; research shows that raindrop formation can be influenced by bacteria as well.