Wind chill

 

Wind chill

As is known, the temperature of the outside air is not always a safe and reliable indicator to determine the cold that a person can feel, if exposed outdoors. There are other meteorological parameters influencing such as wind speed, radiation and humidity. The windchill term is used to describe the lower temperature that a human being feels as a result of the combination of  temperature, humidity and wind in summer.

The wind then removes the layer of air surrounding skin, which serves to reduce the feeling of heat as long as the temperature does not exceed the skin temperature (32 ° C).

The most effective way for the body to lose heat is sweating. Perspiration evaporates consuming gives our body heat. When humidity is high, evaporation is less and therefore increases the wind chill. While, when the humidity is low, evaporation increases and therefore our body loses heat and reduces our windchill.

Temperature (° C)	Lower wind speed 12.5 km / h	Wind speed between 12.5 and 21.5 km / h	Wind speed between 21.5 and 36 km / h	Wind speed between 36 and 50 km / h	Wind speed exceeding 50 km / h
20	0	-1	-3	-4	-4
21	0	-1	-3	-4	-4
22	0	-1	-2	-3	-4
23	0	-1	-2	-3	-4
24	0	-1	-2	-3	-4
25	0	-1	-2	-3	-4
26	0	-1	-2	-3	-3
27	0	-1	-2	-3	-3
28	0	-1	-2	-3	-3
29	0	0	-1	-2	-3
30	0	0	-1	-2	-2
31	0	0	-1	-2	-2
32	0	0	-1	-1	-1
33	0	0	0	-1	-1
34	0	0	0	0	0
35	0	0	0	0	+1
36	0	0	0	+1	+1
37	0	0	0	+1	+2
38	0	0	0	+1	+2
39	0	0	+1	+2	+2
40	0	0	+1	+2	+3
41	0	0	+1	+2	+3
42	0	0	+1	+2	+3
43	0	0	+1	+2	+3
44	0	0	+1	+2	+3
45	0	0	+1	+2	+3
46	0	0	+1	+2	+3
47	0	0	+1	+2	+3
48	0	0	+1	+2	+3
49	0	0	+1	+2	+3
50	0	0	0	+2	+3