The correct answer is that the vast majority of wheat harvest in Argentina occurs in December with a little bit left to finish up in January. This would be when it is cold with the snow blowing in the central states and great Plains of the US where most of the United States wheat is grown.

Remember that Argentina is in the southern hemisphere and its weather patterns are 180 degrees (or 6 months) out of sync with the weather in the northern hemisphere. In the United Stated, most of the wheat harvest starts mid to late June and finishes up in early July.