Rain is liquid precipitation which is water falling from the sky. Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then become heavy enough to fall under gravity. Rain is part of the water cycle. A light rain of small drops is known as a drizzle. Spring is the rainiest season of the year as measured by the number of days with precipitation. Rainfall is measured by the depth of water that falls on a level surface without soaking in. Rainfall is measured with a rain gauge.


Clouds are made of water droplets. Within a cloud, water droplets condense onto one another, causing the droplets to grow. When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain.


Rain is a wonderful gift of Nature to all mankind. Rain is a major source of water to the inhabitants of the earth, and it also plays a major role in ensuring the water cycle is complete. Rain may be the most essential weather phenomenon for life to exist on Earth. The growth of plants also may depend on rain. Without rain, no crops would grow. If rainfall is less, there is water scarcity which sometimes causes a drought-like situation. It can improve the level of groundwater. Rainfall is also very important for the survival of plants and animals. It brings freshwater to the earth’s surface. With temperature, rainfall is perhaps the most important factor in defining climate. Rainfall is also the major source of energy that drives the circulation of the atmosphere. The rain waters the Earth and refills streams, rivers, lakes, and oceans, and provides the moisture trees and plants use to make their food. This water also gives wild animals the water they need to drink. Thus, Rain is very important.


Some of the interesting facts about rain are,

* Some regions of the world get rain nearly every day or every other day. Galway, Ireland gets this weather about 220 – 230 days or more each year. Similarly, parts of Hawaii and other tropical areas receive brief spurts of rain on an almost daily basis.

* The place that receives the most annual rainfall on average is a village in India called Mawsynram, Meghalaya, India. They receive about 467 inches each year, most of which falls during monsoon season.

*Drops are not shaped like teardrops as they fall, as is commonly depicted – they are actually dome-shaped.

* When raindrops fall on clay or dusty soils, they trap small air bubbles on the surface which raise upward and burst out of the droplet. This then produces pockets of scent into the air where they are then carried by the wind. This is what causes the familiar smell of rain, which is called ‘Petrichor’.

*Up in the clouds, rain most often starts off as snow. Clouds are made of freezing-cold water droplets and tiny crystals of ice. In most rains, this cold water adheres to ice, forming nascent drops that then fall out of the clouds. As they descend towards the relative warmth of the earth’s surface, they melt and become rain.

* Not all raindrops are made of water: Rain also consists of sulfuric acid or methane, which can also be found on other planets in the solar system.