The weather forecast in Gaochun is 7 days a week.

The dividing line between the northern and southern hemispheres and the northern and southern latitudes is the equator (latitude 0), with the northern hemisphere in the north and the southern hemisphere in the south. Looking at the map, we can see that A and C are located in the southern hemisphere and B and D are located in the northern hemisphere.

At different positions in its orbit, the earth is not completely irradiated by the sun, forming four seasons: spring, summer, autumn and winter. In mid-latitude areas, the seasonal changes are obvious, and the seasons in the northern and southern hemispheres are opposite. So, if the position of point D is summer, then the position of point C is winter.

So choose: C.