POI changing everyday on M3 .30 cal using hybrids???????

I have been fighting what i thought was my poi changing everyday at 100 yards. Sight in all good, next day group is left. sight in again then next day group is to the right.

Then i got a wind meter. What i thought was zero wind is 3-4 mph wind. At my house it always blows from rt to left across my range. I can't believe how much it moves the slug at 100 yards.

do anyone use a permanent digital wind meter at their range that they can read direction and speed from in their house?