While the Northern Hemisphere shivers through winter, this region basks in long, languid days perfect for exploration. Central Chile, including Santiago, experiences a pleasant Mediterranean climate, while the southern regions begin to feel the cooler breezes of the Southern Ocean.
South America December Weather: Sunny Skies and Regional Variations
However, travelers should be prepared for potential disruptions to road and river transport due to flooding. Region Typical Temperature Conditions Amazon Rainforest 25°C to 32°C (77°F to 90°F) Hot, humid, frequent rain showers Rio de Janeiro, Brazil 26°C to 32°C (79°F to 90°F) Sunny, humid, occasional showers Buenos Aires, Argentina 20°C to 30°C (68°F to 86°F) Warm, sunny, vibrant city energy Patagonia, Chile 10°C to 20°C (50°F to 68°F) Festivals and Cultural Weather.
Regional Climate Variations in December The sheer size of South America means December weather is far from uniform. Patagonia, though cooler, presents a stark and beautiful landscape perfect for hiking, with clearer skies compared to the north.
South America December Weather: Sunny Skies and Regional Variations
Buenos Aires and the Uruguayan coast enjoy warm, sunny days with average temperatures ranging from 23°C to 30°C (73°F to 86°F). Expect high humidity, frequent afternoon showers, and temperatures consistently hovering around 30°C (86°F).
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