October vs March

Best match

The best-kept secret month — perfect spring temperatures, clear Andes, and almost no tourists.

• ↑October is the finest month for experiencing Santiago as a city. Temperatures hit 22°C with low humidity, the Andes are crystalline on most days (the spring rain has cleaned the air but the summer heat haze has not yet arrived), and the city's outdoor culture is fully reopened after winter. The Lastarria neighbourhood terrace scene, the weekend Parque Forestal craft markets, and the Cerro San Cristóbal dawn walks are all at their best.
• ↑The Cajón del Maipo valley — with its rock formations, hot springs at Termas Valle de Colina, and the whitewater of the Maipo river — is at peak beauty in October. Spring wildflowers cover the valley floor and the snowmelt rivers are at full flow. It is one of the best day trips from any South American capital.

Best match

The unmissable month: vendimia wine harvest, Lollapalooza, and perfect autumn temperatures.

• ↑March is the single most compelling month in the Santiago calendar. The vendimia — grape harvest — transforms the Maipo, Colchagua, and Cachapoal valleys within 90–150km of the city into a working festival landscape. Viña Santa Rita (Alto Jahuel, 35km south), Viña Undurraga (Talagante, 34km west), and the prestigious Almaviva estate all open for harvest visits. The regional Fiesta de la Vendimia events in the vine towns — Santa Cruz in Colchagua and Curicó further south — involve grape-stomping competitions, folk music, and local food in a genuinely Chilean celebration that precedes the international wine tourism by centuries.
• ↑Lollapalooza Chile (late March) at the Parque O'Higgins is one of South America's largest music festivals: 80,000+ attendance, four stages, an international lineup that competes with the North American event. The surrounding neighbourhood of Barrio Brasil and the fan culture around the event gives Santiago a temporary festival-city energy.