Just an option…
http://www.midwayusa.com/product/954129/kestrel-1000-electronic-hand-held-wind-meter?cm_vc=subv954129

The best option is to observe the area around you and where your shooting to , it's in my opinion one of the things to lean how to shoot is to read the wind without needing to youse meters etc , and being a Yorkshire man it's free which suit me just fine

If you use a smart phone you might consider this;

http://www.amazon.com/WeatherFlow-WFANO-01-Wind-Meter/dp/B00E9AF7ZU

$35 and seems well made if the reviews are anything to go by.