It's summer in the northern hemisphere. Why is the temperature in the southern hemisphere not low?

Summer in the northern hemisphere, winter in the southern hemisphere, low temperature.

However, because most of the land in the southern hemisphere (except Antarctica) is located in the middle and low latitudes, even if the temperature is low, it will not reach severe cold. In addition, the southern hemisphere has a vast ocean area, and the climate is more obviously influenced by oceanography than the northern hemisphere, so the climate is relatively warm and humid, and it will not be particularly cold.

Some time ago, the news reported that there was extremely cold weather in South America, but it was only MINUS 20 degrees, which shows that this temperature is very low in the southern hemisphere. ...