The best indicator of too much wind is to look at the flags near your flying field. If the med sized flags are fluttering out from the pole, there is prob too much wind for most planes. If you can feel the wind in your face, it is probably too much. Tie a ribbon to your TX antennae - if is is blowing out at much more than 45 degrees you are pushing it. If wind bounces the plane around at all while it sitting on the ground, it is too much.

After you get some experience, you will be able to handle more wind. But at first, it is best not to fly if conditions are questionable. If you are wondering if there is too much wind, there probably is.