Because of Paraguay’s intense summer heat, winter months (May to September) are preferable. The weather is variable and nightly frosts are not unusual.
Southern Paraguay’s climate is humid, with rainfall distributed fairly evenly throughout the year. In the east, near the Brazilian border, it averages an abundant 2000mm a year, declining to about 1500mm near Asunción. Since elevations do not exceed 600m, temperatures are almost uniformly hot in summer – the average high in December, January and February is 35°C (95°F), with daily temperatures ranging between 25°C and 43°C (77°F to 109°F). Winter temperatures are more variable and can reach freezing or hover at 6°C (42°F), though the average high in July, the coldest month, is 22°C (71°F).