Salta weather in September

Tilcara-forum threads comparing towns across the Quebrada de Humahuaca describe this as the more developed base of the three, better infrastructure and more dining options than smaller Purmamarca while still working well as a hub for exploring the wider valley. Posters call September through the following few months a genuinely favorable stretch, daytime temperatures comfortable though the roughly 2,400 meter elevation means a dramatic drop once the sun starts going down. Regulars describe evenings as turning noticeably cool fast, layering standing advice, a fleece and windproof shell recommended over the daytime t-shirt. Posters call the air here genuinely thin and clear this time of year, a real factor for anyone unused to altitude. Regulars recommend the colorful Cerro de los Siete Colores and the market as worthwhile stops regardless of exact dates. The record: 21.8C days feeling like 20C, 9C nights, a low 52 percent humidity and 10.8 hours of sun.

Salta's forum describes April as the tail end of the wet season, with roughly even odds of rain early in the month dropping off sharply as it goes on - several posters said the rains typically wrap up around Easter, after which the Northwest settles into some of its best weather of the year. Nights get properly cold at Salta's altitude even as days stay mild to warm. The practical advice repeated most often is to avoid driving the mountain routes toward Cachi during an active downpour, since those roads are more exposed than the well-paved routes to Purmamarca or Cafayate.

Forum posters describe October as warm by day - some reporting highs over 90F - cooling noticeably at night, with sunny skies and little rain the norm; posters note the broader April-through-November stretch here is essentially dry, so October sits comfortably within that reliable dry season. Standard packing advice given the day-to-night swing: layers for cooling evenings plus sun protection (sunscreen, sunglasses) for the strong high-altitude daytime sun. Posters consistently pair a Salta visit with nearby Cafayate (wine country) and Purmamarca (the colorful hillside town), both commonly reachable as day trips or short add-ons and similarly favorable weather-wise in October.