What instrument is used to measure the speed of the wind?

The instrument used to measure the speed of the wind is the anemometer. This device typically consists of rotating blades or cups that catch the wind, with the speed of rotation correlating to the wind speed. Anemometers can provide important data for weather forecasts, sailing, aircraft operations, and various outdoor activities, allowing users to gauge wind conditions effectively.

A barometer, on the other hand, measures atmospheric pressure and is employed to help predict weather changes but does not provide any information on wind speed. A thermometer is used for measuring temperature, while a psychrometer is used to determine relative humidity through the use of a wet and dry bulb. Each of these instruments serves a distinct purpose within the meteorological field, but only the anemometer directly measures wind speed.