Which instrument measures rainfall?

Which instrument measures rainfall?

• A. Barometer
• B. Rain gauge
• C. Hygrometer
• D. Anemometer

Answer: (B)

Rainfall is measured by directly collecting precipitation and turning it into a measurable depth. A rain gauge does exactly that: it sits in the open, catches rain, and preserves a sample whose height in the container can be read over a set period. This gives the total amount of rain that fell, usually expressed in millimeters or inches. Other tools track different aspects of the atmosphere: a barometer measures air pressure for weather forecasting, a hygrometer gauges humidity, and an anemometer measures wind speed. So the rain gauge is the one that quantifies rainfall itself.

Rainfall is measured by directly collecting precipitation and turning it into a measurable depth. A rain gauge does exactly that: it sits in the open, catches rain, and preserves a sample whose height in the container can be read over a set period. This gives the total amount of rain that fell, usually expressed in millimeters or inches. Other tools track different aspects of the atmosphere: a barometer measures air pressure for weather forecasting, a hygrometer gauges humidity, and an anemometer measures wind speed. So the rain gauge is the one that quantifies rainfall itself.