What are the functions of the following weather instruments?

1.rain gauge
2.Hygrometer
3.Windsock(I think it tell the strength of the wind right?)
4.Barometer
5.Windvane

2 answers

The windsock also tells the direction. This is used on Surface winds only.

Look the other terms up in http://www.onelook.com/
ok thank you soooooo much!!!!!