Weather Instruments

by: kayla carr

Rain Gauges

Rain Gauges are used to measure the amount of precipitation. Examples of precipitation are snow, rain, sleet, and hail. The rain is measured by falling into the gauge and it has measurements on the side.


A thermometer is used to measure air temperature. It is a closed glass tube that is filled with either mercury or alcohol. The air around the thermometer heats the mercury or alcohol and it expands and goes up which tells you the temperature.


A barometer is used to measure the air pressure. It tells you wether the air pressure is rising or falling. If the barometer is rising, that means good weather. A falling barometer means bad weather.

The Sling Psychrometer

The sling psychomotor measures relative humidity . It does this by using the cooling effect of evaporation. It is made up of two thermometers and to work it you wet the cloth that is on one of the thermometers and you spin it around a few times the water will evaporate from the cloth and causing the temperature on the thermometer to change.

A Wind Vane

A wind vane determines what direction the wind is coming from. It would be turned the way the wind is blowing from.

An Anemometer

An Anemometer measures wind speed. Cups are attached to pieces of wood that are able to spin. The cups catch the wind turning the dial that is attached to the anemometer. The dial shows the speed of the wind.

Weather Maps

Weather maps show atmospheric conditions above a large area of the earths surface. Meteorologists usually use weather maps the forecast the weather.

A Hygrometer

A hygrometer the water vapor in the air. It also measures the humidity.

A Weather Balloon

A weather balloon measures weather conditions high in the atmosphere.

A Compass

A Compass is a instrument used for finding directions.

Weather Satellites

Weather Satellites are used to take pictures and track large-scale air movements. They also analyze data from computers.