It is done with help of rain gauge
A rain gauge.
rainfall is measured in inches
a rain gauge
yes it is
In the United States, rainfall is measured in inches; in pretty much the rest of the world, rainfall is measured in centimeters (the standard unit of small length measurement).
In USA it is measured in inches, in. In other countries it is measured in millimetres, mm.
A Rain Gage
you but why would you ask that
No, it is measured by a rain gauge. An anemometer measures wind-speed.
Rain gauges are calibrated in millimeters
amount of rainfall
Usually small distances. You may get rainfall measured in mm.
A continuous record of rainfall is measured by a rain gauge. Although it is impossible to measure all the rainfall in a specific area, a rain gauge can give meteorologists a good idea of how much rain has fallen in an area.