The short answer is:
The best way to think of Brazil’s winter is: how cold is brazil
Brazil is not a cold country. You will never need a down parka for a trip to Salvador or Manaus. However, if you visit the South in July, or São Paulo during a polar air mass, you will be genuinely cold. Not "I need a rescue helicopter" cold, but "Why is my uninsulated apartment colder than the sidewalk, and why is my shower only spitting lukewarm water?" cold. The short answer is: The best way to
Brazil’s identity is synonymous with tropical heat, Carnival, the Amazon, and endless sunny beaches. The country is famously not a winter destination. However, to say it’s simply "hot" misses the nuance of a continental-sized nation (the 5th largest on Earth) with varied topography, from the Amazon basin to the southern plains and even subtropical highlands. Not "I need a rescue helicopter" cold, but