Brazil is a tropical country. It normally does not receive snowfall.
Brazil is not located in the polar region. Most of its part is located in the tropical zone.
Snowfall generally occurs in the temperate and polar zone due to polar winds. It also occurs in the mountainous and hilly regions of high altitudes.
There are no mountainous regions in Brazil. But in exceptional conditions, southern polar air masses reach the southern part of Brazil. This causes snowfall here.
Therefore, snowfall doesn’t always occur in Brazil.