Because of Olympics.
Citizens of the United States, Japan, Australia, and Canada won’t need a visa to visit Brazil between June 1 and September 18, 2016.Likely because of Olympics.
whats the savings over the usual cost?
Great time for Rio or Manaus, other places will be cold.
Is the weather in Rio and São Paulo so different? They're pretty close to each other (hour flight/6 hour drive)
cold is what it is in NY today, Brazil never gets "cold", true, it's their winter but it wont go below 50 in most places
rio is on the water so it can be a bit cooler they are only about 400km apart (6 hour drive because of traffic)