There are are also two decisions he can make which will help, before the shooting starts. Not all bullets are effected by the wind to the same degree. Let's consider large and small ones, and fast and slow ones. Large, heavy bullets or balls have more inertia, that property which makes any moving object tend to continue moving in a straight line. Large, heavy bullets resist the sideways push of wind better than small, light ones.
Small bullets fly at greater velocities than large ones, generally.
Shooting in the wind, fast is good. The ball reaches the target quicker, giving the wind less time to divert it from the straight and narrow. So, the ideal bullet for shooting in the wind is a large, heavy, but fast one. We run against constraints of recoil, comfort and quality of shooting as the charges required to move a large bullet with high velocity increase, so a point will be reached where a compromise must be made. That point must be decided by each individual shooter.