How does the climate of the Bolivian Chaco change between rainy and dry seasons?

The climate of the Gran Chaco, which includes the southeastern portion of Bolivia, is characterized by a subtropical environment with distinct seasonal variations in precipitation and wind patterns.12

Seasonal Characteristics

• Rainy Season: Occurring during the southern summer (roughly October to March), this period brings a significant portion of the region's annual rainfall. The area's flat topography and impermeable subsoils often lead to rapid and extensive flooding during these months, with large swaths of the region becoming inundated.13
• Dry Season: During the drier months, high evaporation rates sharply reduce effective precipitation, contributing to the region's overall arid nature. Dust storms are a notable feature of this season.1

General Climate Factors

Throughout the year, the region experiences significant temperature contrasts, with average temperatures ranging from 60 to 85 °F (16 to 29 °C). While light breezes are common, the area is also subject to outbreaks of cool polar air from the south, which can bring thunderstorms and strong, gusty winds.1