What is the weather like in Brazil now?

First of all, the guy was wrong. Brazil has no Mediterranean climate (the Mediterranean climate is only adopted on the west coast of the mainland).

Second, the highest latitude in Brazil is about 30, and the latitude in Shanghai is similar. Therefore, the coldest place in Brazil at this time is not around 0, and influenced by the northeast trade wind and the Brazilian warm current, the winter in Brazil will not be very cold.

The coldest month in Brazil is August. However, since the land is mostly tropical (within the tropic of Capricorn), even in Leng Yue, the monthly average temperature is above 15 (note that I said "average").