Het weer in San Salvador de Jujuy in mei

Tilcara-forum trip reports describe the Quebrada de Humahuaca region as reliably pleasant even heading into the cooler months, posters calling the weather here genuinely good by comparison to the harsher conditions found elsewhere in the Andes at similar elevation. The narrow valley, lined by colorful high mountains with Route 9 running alongside the Rio Grande, is called striking regardless of exact travel dates within the favorable season. Tilcara itself is described as an attractive if somewhat dusty town on the valley's east side, a solid base for exploring both the town's own archaeological site and nearby Purmamarca. Posters call the temperature swing between day and night significant at this elevation, warm sun through the day giving way to a real chill once it sets, layers standing advice regardless of how the afternoon felt. The record: 19.8C days feeling like 18C, 8.8C nights, 50 percent humidity and 9.8 hours of sun.

Northwest Argentina's forum describes February as squarely in the rainy season for Jujuy and neighboring Salta - some roads can flood or become impassable, but mornings are typically clear with little landslide risk, and the big storms tend to arrive in the afternoon rather than at random. Posters recommended strong sun protection regardless, since the sun is intense whenever it does break through the cloud cover. It's a month that rewards flexible day planning - clear mornings for sightseeing, afternoon plans held loosely in case a storm rolls in.

Forum posters describe this stretch of northwestern Argentina in August as genuinely excellent - close to zero chance of rain, a dry climate, and sunshine essentially every day, though cold mornings and nights are a real feature of the season. Posters describe a typical day warming into the high-60s to low-70sF by early afternoon before dropping sharply once the sun starts setting, commonly down into the 50sF or cooler by early evening. Posters recommend light clothing plus a hat and sunblock for midday sun exposure, alongside a fleece for the cold mornings and evenings - the day-to-night swing here is described as the defining feature of the season rather than any single extreme.