Temperature 17 to 18 degrees. Is the southwest wind cold or hot?

17- 18 degrees is cold. If you go out, the wind is still cold.

The most comfortable temperature for the body is 26 degrees.

According to Dr. Gui's measurement, the temperature of each garment can be increased as follows: thick down jacket 9℃, thin down jacket 6℃, slightly thick elastic cotton-padded jacket 5℃, thick woolen sweater 4℃, cotton vest 4℃, polar fleece garment 3℃, thin coat 3℃, thick cotton-padded jacket 2℃, thin cotton-padded jacket 1℃.

We can see how to match it.