Purchase a good quality thermometer specific to the type of temperature you need to monitor; IE: Medical, cooking, pool or fish tank. There are different type, but digital thermometors are the most accurate.
One can accurately measure the temperature outside using a thermometer. Thermometers are devices that can be placed outdoors to measure the temperature of the air. The temperature is usually displayed in degrees Celsius or Fahrenheit.
Watch the news. -.-
thermoneter
Temperature is the measure of thermal energy. And how you measure thermometers is that if the liquid expands when its temperature increases. The height of a column of the liquid inside the tube shows the temperature.
Celsius
One can accurately measure the outside temperature using a thermometer designed for outdoor use. Simply place the thermometer in a shaded area away from direct sunlight and wait for it to display the temperature reading.
A thermometer can be used to measure the temperature outside. Digital thermometers, mercury thermometers, and infrared thermometers are commonly used for this purpose.
They had thermometers that were a glass tube with mercury sealed inside. There were temperature markings on the outside of the tube that when the mercury reached that point it showed what the temperature was.
Well it won't work below freezing.
Boiling is way far outside its operating range.
Temperature xD
You measure temperature using a thermometer.