ApexPC:
It's difficult to tell if a cross wind is 90° to the direction of the ball flight, or if it's somewhat more or less.
As Chop so insultingly put it, being exactly correct is not the target - there's potential variables everywhere - wind changes (it's rarely absolutely steady, the likelihood of hitting the ding (and on which side), slope of landing terrain, WGT programmed deviation, ad nauseum...
Make your best guess, given the shot time allotted, and take the stroke. If you get surprised by the result, take a mental note, and play on. It is a game after all - not a matter of life or death.