When you start out, you really don't want to fly in anything over 5 mph. All your energy is going to be spent controlling the plane and saving it from your own overcompensation, so you don't need wind to add to the confusion. This is especially true if you fly micros or anything smaller than, say, 40" wing span.
The good news is that once you have gotten past the first phases of noob-ness and learn to control your plane (this is where I am in my learning process), wind becomes much less of an issue. I can fly my ParkZone T-28D in 15 mph without much problems now. Three months ago, I would have returned home with a bag of foam pellets...