Things to Do in South America in May
May weather, activities, events & insider tips
May Weather in South America
Is May Right for You?
Advantages
- Autumn weather across most of South America means comfortable daytime temperatures of 15-22°C (59-72°F) without the scorching summer heat - perfect for extended city walking tours and outdoor markets without needing constant shade breaks
- Shoulder season pricing kicks in after Easter crowds disperse, with accommodation costs dropping 20-35% compared to July-August peak, and you can actually book popular restaurants in Buenos Aires or Lima the same week instead of months ahead
- Patagonia enters its absolute prime window - trails in Torres del Paine and El Chaltén are fully accessible after winter snow clears, winds calm down significantly compared to summer months, and you get 10-11 hours of daylight for hiking without the December-February tourist bottlenecks
- Harvest season throughout wine regions in Argentina and Chile means you can visit working vineyards during actual production, see crush operations in action, and taste young wines straight from fermentation tanks - something impossible during the tourist-heavy but agriculturally quiet summer months
Considerations
- Rainfall increases across the Amazon basin and northern regions with 150-200 mm (5.9-7.9 inches) typical in Iquitos and Manaus, making some jungle lodges harder to reach and river levels unpredictable - though honestly this creates better wildlife viewing as animals congregate around remaining water sources
- Beach destinations along Brazil's coast and Caribbean Colombia start their low season as water temperatures drop to 22-24°C (72-75°F) and you get occasional gray days - not ideal if your primary goal is lounging on tropical beaches, though still perfectly swimmable for most people
- Altitude destinations like La Paz, Cusco, and Quito experience their dry-to-wet transition with unpredictable afternoon weather - you might get brilliant sunshine or sudden hail within the same day, making photography and outdoor planning more challenging than the bone-dry June-August window
Best Activities in May
Torres del Paine Circuit Trekking
May sits in that sweet spot where Patagonian trails are fully snow-free but summer crowds have not arrived yet - you will actually find available refugio beds without booking 6 months ahead. Winds average 30-40 km/h (19-25 mph) instead of the punishing 60+ km/h (37+ mph) gusts common in December-January. Daytime temperatures hover around 10-15°C (50-59°F), cold enough to keep bugs minimal but warm enough for comfortable hiking with proper layering. The W Trek takes 4-5 days, full circuit 8-9 days.
Mendoza Wine Harvest Tours
This is the actual vendimia period when grapes come off the vines and crush operations run daily. Unlike the summer tourist season when you just taste finished wines, May lets you see destemming machines in action, smell active fermentation tanks, and taste juice that will become next year's Malbec. Temperatures in Mendoza sit around 18-22°C (64-72°F) during the day, perfect for cycling between bodegas without overheating. The Fiesta Nacional de la Vendimia happens in early March, but smaller harvest celebrations continue through May at individual wineries.
Iguazu Falls Exploration
May brings higher water flow as autumn rains accumulate - the falls run at roughly 1500-1800 cubic meters per second compared to 1000 during dry winter months, creating more dramatic curtains without the occasional summer floods that close walkways. Temperatures reach 22-26°C (72-79°F) with 70-75% humidity, warm enough to enjoy the spray without feeling swampy. You get the increased water volume benefit without the December-February crowds that pack the Brazilian and Argentine sides. Budget a full day for each side of the falls.
Salar de Uyuni Multi-Day Tours
May marks the transition between wet and dry seasons on the salt flats - you might catch the last of the mirror effect from residual water while also getting clear skies for stargazing, though this varies year to year. Daytime temperatures reach 15-18°C (59-64°F) but drop to -5 to 0°C (23-32°F) at night at 3656 m (11,995 ft) elevation. The shoulder timing means fewer 4x4 convoys crossing the flats compared to July-August peak. Standard tours run 3 days covering the salt flats, colored lagoons, and geysers.
Amazon Jungle Lodge Stays
Rising water levels in May actually improve wildlife viewing as animals concentrate around accessible areas and boat access expands to flooded forest zones. You will see more pink river dolphins, caimans gather at remaining beaches, and bird activity increases during the wet-dry transition. Temperatures stay consistent at 28-32°C (82-90°F) with 80-85% humidity and afternoon rain likely 60-70% of days - plan morning excursions and accept that you will get wet. Three to four-day lodge stays provide better wildlife encounters than quick day trips.
Buenos Aires Tango and Food Experiences
May brings comfortable autumn weather for walking Buenos Aires neighborhoods without summer's oppressive heat - perfect for afternoon milonga visits and extended market browsing. The city operates at local pace rather than tourist pace, with authentic neighborhood milongas running nightly and parrillas full of porteños rather than tour groups. Temperatures sit around 18-22°C (64-72°F), ideal for outdoor cafe sitting and evening strolls through Palermo or San Telmo. Cultural events ramp up as the winter arts season begins.
May Events & Festivals
Fiesta de las Cruces
Celebrated across Peru, Bolivia, and parts of northern Chile during early May, this festival combines Catholic and indigenous traditions with elaborate crosses decorated with flowers, textiles, and offerings placed on hillsides and in town squares. In Cusco and La Paz you will see processions, traditional dance competitions, and street markets selling ceremonial items. The festival provides genuine cultural immersion beyond the typical tourist circuit.
Corpus Christi Preparations
While the main Corpus Christi celebration happens in June, late May brings preparation activities throughout Cusco and other Andean cities - you will see carpet-making with flower petals, rehearsals for religious processions, and markets selling ceremonial breads and decorations. This behind-the-scenes period offers interesting cultural observation without the overwhelming crowds of the actual festival day.