ORIGINAL: RCKen
Here in Oklahoma we live with pretty constant wind like you do too. I would say for a beginner 10-15 mph would probably be too much. But it really depends on a lot of things. 20 mph straight down the runway is a lot easier to deal with than a 10 mph crosswind at times. Things like this is why the instructor is having you call, because there are times that you can't judge just by the wind speed.
Ken
20 mph striaght down the runway is some of the most fun I`ve had. But, 10 to 15 crosswinds can be trying for the most seasoned flyer. That`s why your instructor is having you call , the right windy day may be what he is looking for, to round out your training.