Wind Vane:

Wind direction will be measure with a wind vane .Wind
direction is the compass point from which the wind is coming e.g. south,
southwest, west etc. the unit of measurement for wind direction is therefore
compass direction. User plot the wind direction for each day of the month on
a special graph called a wind rose i.e. - which indicates he direction of
wind at the point observation. Manufactured as per IS 5799:1970.