Well, let's see, average temperature of 29 °C (84 °F) in Brazil in December and average temperature of 5 below enough to freeze an elephant from trunk to tail where you live... uhmm... I wonder....
It depends where you go: some people shake hands, others kiss on cheek (one or two kisses), some give hugs.
But there are some cities where they're not used to body contact. So, it's better to say...