Weather Measurement

Temperature, wind speed, precipitation, and humidity instruments

Meteorologists use instruments to measure weather: thermometers measure air temperature; anemometers measure wind speed (spinning cups catch the wind); rain gauges collect and measure precipitation; hygrometers measure humidity (moisture in the air). Weather changes day to day but follows patterns by season. Temperature is measured in Celsius (°C) or Fahrenheit (°F). Wind speed is measured in km/h or mph. Precipitation is measured in millimeters of water collected. By recording weather data over time, you can spot patterns and make predictions.