It helps if you can put some numbers to it.
I didn't go to the worlds but it looks like the location was less than 200 metres above sea level, and for many of us our home courses or zeroing ranges will be similarly at not much of an altitude. So the barometric pressures at both locations will be similar, excluding the effects of weather, rather than climate.
If you zeroed your kit at 15 degrees and 80 percent RH then shot at 28 degrees and 50 percent RH (which is quite a big difference) you would experience roughly five percent less dense air at the worlds site compared to home.
The drag on the pellet will be in linear proportion to the air density, so 5 percent lighter air means 5 percent less drag. In theory this would lift the line of the trajectory and make the influence of wind a little less.