India is a poor country so the irrigation system for the town of Cherrapunji is insufficient to provide adequate amounts of clean, potable water from below during the dry season. People who live there frequently have to travel on foot for several kilometers to bathe and get drinking water. The oceans are the chief source of rain, but lakes and rivers also contribute to it. The sun's heat evaporates the water. It remains in the atmosphere as an invisible vapor until it condenses, first into clouds and then into raindrops.
Condensation happens when the air is cooled.
For raindrops to form there must be particulate matter in the air, such as dust or salt, at temperatures above freezing. These particles are called condensation nuclei . When the nuclei are cooled to temperatures below the freezing point, water condenses around them in layers. The particles become so heavy they resist updrafts and fall through the clouds as rain. This cooling of the air causes the moisture trapped in the air to condense, forming clouds, which then release rain.