In fact I didn't see snow in Brazil... Just read about it!
I wonder where you read about it, because as far as I know snow in Brazil only happens like every 50 years and only in the coldest places (I guess Curitiba and Rio Grande do Sul)... and even then, I think I'm highballin. It's probably more rare than that.
As crazy as it may sound, snow has been falling more frequently in the latest 20-30 years. In 2013, 120 cities in the South Region registered snow.: http://noticias.terra.com.br/infograficos/mapa-da-neve/
In 2014, 14 cities saw snow and in 2015, apparently no city had snow. It seems that snow here happens in cicles of 03-04 years.
Of course it´s nothing comparable to what we see in countries like Argentina or Chile, when it happens it´s just thin snow, not enough for snow sports, for example, but enough to see a white landscape in high points of the region.