The Wind Chill Factor
Basically, wind chill is the temperature which us, humans would feel, although it is not what we think. For example, in a cold country, the temperature could read 0C, but as wind blows, it will actually feel like -6C. That is wind chill. Why does this happen? To start, the human body has a core temperature of roughly 37C, while the temperature of the surrounding air is usually below 37C (assuming in a cold country). So, if a breeze blows, it cools the temperature of our skin to almost air temperature.
Although wind chill affects us humans, it does not actually work the same way on inanimate objects, like water, for example. Lower wind chills mean that inanimate objects cool to the air temperature more quickly, but even high winds can't force the object's temperature below the air temperature. What is meant by that is, wind chill is not able to lower the temperature of an object, below the air temperature. For example, even when your skin feels like 0C, but the surrounding air temperature is only 6C, the water is not able to freeze even though it feels like it is at its freezing point.
To measure wind chill, there are a few things that are needed to be justified. They are; wind speed and the temperature of the surrounding air. The measurement of wind speed is usually done with an Anemometer, while the measurement of the surrounding air is simpler, with a Thermometer.
Ethan Trex. (December 27, 2010). Mental Floss. In How Is Wind Chill Calculated?. Retrieved July 10, 2013, from http://mentalfloss.com/article/26730/how-wind-chill-calculated
Chan Sai-tick. (March 2011). Hong Kong Observatory. The Wind Chill Effect. Retrieved July 10, 2013, from http://www.hko.gov.hk/education/edu01met/wxphe/ele_windchill_e.htm