South America in January: Weather, Crowds & What to Expect

Caribbean Coast & the Guianas (Venezuela’s northern coast, Guyana, Suriname, French Guiana)

High humidity and frequent downpours mark this month; daytime temperatures around 28-32°C along Caracas, Porlamar and Georgetown but the air feels heavy and sticky. Coastal roads can flood after tropical squalls and rivers in Guyana rise quickly, so expect delays if you’re transferring overland. Beach time is possible between showers, but drier months (December-March) tend to be better for long, uninterrupted sun. Pack a lightweight rain jacket, insect repellent and plan indoor options for sudden storms.

Amazon Basin (Brazilian Amazon, eastern Peru, southern Colombia, Ecuador, Bolivia)

Expect oppressive humidity and frequent heavy rain in most lowland Amazon locations, with daytime temperatures typically 28-33°C; river levels are high so many wilderness lodges are accessed by boat. Manaus, Iquitos and Leticia are hot and muggy with short, intense thunderstorms in the afternoons; wildlife concentrates along higher banks so guided canopy and river tours remain productive. Take waterproof gear and accept that trails will be muddy-bring insect repellent and a dry bag for electronics.

Northeast Brazil & the Sertão (Coastal cities: Salvador, Recife, Fortaleza - interior drylands of the Sertão)

Coastal trade winds keep temperatures warm and the sea inviting, with daytime highs around 28-32°C in Salvador, Recife and Fortaleza; the beaches are lively and Carnaval planning ramps up later. The interior sertão is already dry and hot, often exceeding 35°C during the day; travel there requires sun protection and plenty of water. This is a good window for coastal tourism-lightweight clothing, sunscreen and early-morning activity planning help you avoid midday heat.

Southeast Brazil & Central Plateau (Rio de Janeiro, São Paulo, Minas Gerais, Brasília, Goiás)

Coastal cities start the year hot and humid with frequent afternoon thunderstorms; Rio and São Paulo see highs commonly in the low 30s while Brasília is dry and warm with clearer skies. Beach culture is at its peak and festival season around Carnival fills hotels - book well ahead. For longer inland excursions to Minas or Goiás, light layers for air-conditioned interiors plus a compact umbrella for sudden coastal showers are sensible.

Andean Highlands & Altiplano (Colombia highlands, Ecuador, Peru highlands, Bolivia’s Altiplano, northern Argentina high Andes)

High-altitude sun is intense and temperatures vary sharply between day and night; cities like Quito, Bogotá and Cusco see dry, sunny mornings with daytime highs around 15-20°C but nights can fall below freezing. Clear skies in many areas make this a strong month for highland trekking and archaeological visits-you can comfortably walk the Inca Trail in dry sections, though trails will be busier. Altitude acclimatisation is essential: plan rest days and carry warm layers for picnic stops and nights.

Northern & Central Chile - Atacama, Coastal North and Central Chile (Arica to Santiago, including Atacama Desert and valleys)

Desert dryness dominates the north with very low humidity and daytime heat around 25-30°C in Arica and San Pedro de Atacama, while coastal cities like Iquique enjoy cool Pacific breezes. Nights in the desert are very cold, sometimes near freezing in high-altitude Atacama, so layers are essential for stargazing trips. This season is excellent for telescope visits, salt flat tours and clear-sky photography; carry sunscreen and a warm hat for night excursions.

Patagonia & Tierra del Fuego (Southern Chile & Argentina: Chiloé, Puerto Montt, Torres del Paine, Ushuaia, southern Lake District)

Windy, cool days and crisp sunlight mark summer’s start in the far south; daytime highs in Torres del Paine and Ushuaia usually reach 8-15°C, though gusts make conditions feel colder. Glacial melt feeds spectacular waterfalls and long daylight helps multi-day treks, but trails remain muddy in some river valleys. Pack a sturdy windproof shell and layered clothing because weather can swing from warm sun to driving rain within hours.