Climate of South Brazil
The climate of South Brazil, which is located below the Tropic of Capricorn in a temperate zone, is influenced by the system of disturbed circulation of the South, which produces the rains, mainly in the summer. It is also influenced by the system of disturbed circulation of the West, that brings rains and storms, sometimes hail, producing winds with bursts of.
Regarding temperatures: the winter is cool and the summer is hot. The annual medium temperatures range from, and in places with altitudes above, drops to approximately. Some parts of the southern region also have an oceanic climate.
In the summer, mainly in January, in the valleys of the rivers Paranapanema, Paraná and Ibicuí-Jacuí, the medium temperature is in excess of, and the medium temperature of the river Uruguay surpasses. The average maximum temperature stays around on the elevated surfaces of the plateau and, in the lowest areas, between.
In the winter, mainly in July, the medium temperature stays relatively low, oscillating between, except for the valleys of the rivers Paranapanema and Paraná, besides the coast of Paraná and Santa Catarina, where the averages are approximately. The average maximum temperature is also low, around, in the big valleys and in the coast, and in the plateau region. The average minimum temperature varies from
, and the thermometer frequently registers temperatures near 0 °C or below, accompanied by frost and snow, in consequence of the invasion of polar masses.
The annual medium pluviosity oscillates from, except along the coast of Paraná and west of Santa Catarina, where the values are in excess of, and in the north of Paraná and in a small coastal area of Santa Catarina, which have lower recordings down to. The maximum pluviometric indexes occur in the winter and the minimum in the summer throughout almost the whole area.