Monte Carlo is a city in Santa Catarina, in the Southern Region of Brazil. It is part of the metropolitan region of the city of Fraiburgo. Monte Carl…Monte Carlo is a city in Santa Catarina, in the Southern Region of Brazil. It is part of the metropolitan region of the city of Fraiburgo. Monte Carlo has Oceanic climate in general, the temperature varies from 2°C to 31°C and is rarely lower than -3°C or higher than 35°C. Frost are common on winter.