Warm air rises, and with it rise the water droplets. These tiny drops rise if cold air blows in. Mountains can also make them rise, which is why it rains a lot there. When the air holds lots of water droplets, clouds form. If a lot of water droplets gather in the clouds, the clouds become heavy. Gravity causes the water droplets to fall as rain.
Fun Facts about Rain for Kids
- Rain happens in two ways usually: as a drizzle or a shower. A drizzle is a slow, light rain that can go on for hours. A shower is a fast, heavy rain that lasts just a short while.
- Raindrops fall at a speed of 7 to 18 mph. In wind, they might fall much faster.
- Flash floods happen when it rains a lot and water rises very quickly. Flash floods are dangerous. They kill more people in the U.S. than tornadoes, earthquakes or lightning.
- Weather reporters use Doppler radar to detect rain, hail and other storms. This equipment can tell how much moisture is probably coming, as well as the wind speed.
- Rain contains more than just water. It might contain dirt, dust, insects, grass or even chemicals.
- Vapor: a gas
- Gravity: the Earth’s force, which pulls everything down
- Humid: moist, sticky
- Moisture: water
Learn More All About Rain and How it is Formed
Check out this fun video all about rain:
A video animation of how and why rain happens.
Question: How much does it rain every year?
Answer: How much rain you get depends on where you live. Hawaii gets over 63 inches of rain every year, making it the rainiest state. Nevada gets only 9 ½ inches of rain each year, making it the driest state. Western states are usually pretty dry. Places in the south, the Pacific Northwest and the east coast get more rain.