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thumbnail of São Paulo.jpg
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 >>/37575/
Two towns in the southern highlands have flurries on a yearly basis and in some years real snow. The rest of the south has snowfall in rare years. See: 
https://youtube.com/watch?v=YQBKDbCBXD0
https://youtube.com/watch?v=KFoGY7Lbocw
The southeast has snowfall in the highlands on rare years, possibly it took place in São Paulo in 1918. But the southeast has a winter, most of it is made of highlands but even the tropical lowlands have a noticeably colder middle of the year.