Precipitation

Precipitation is water that falls from the air. The most common form of precipitation in the UK is relief rainfall: (Click to enlarge.) Other forms of precipitation we get in the UK include: Snowflakes which are made up of tiny ice crystals that form when the temperature is below freezing. Sleet which is a mixture of partly melted snow and rain. Hailstones which are made up of lots of layers of ice, formed when raindrops freeze within clouds.