It's not happy above about 20mph but you can fly up to around 30mph gusts.
Winds usually get dramatically stronger once above buildings or trees.
But the risky part is getting off the ground without being flipped - don't use auto take off it's too gentle.
If Obstacle Avoidance is turned on forward speed is much lower and it is more likely to be unable to hold position.
It's not easy to assess the strength accurately unless you have a portable anenomter.
If it seems too windy it probably is unless you only keep it pretty low and in some sort of shelter.