September · Argentina
Best time to visit El Chaltén in September Weather, crowds & prices
Weather in El Chaltén in September
Average temperature -3°C, 108 mm of rain, about 7 days with 6+ hours of sunshine and 85% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
3.6/10
Ranked #7 of 12 months
- Avg temp
- -3°C
- Rainfall
- 108 mm
- Humidity
- 85%
- Days with 6h+ sun
- 7
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in El Chaltén scores 3.6/10 for nature and wildlife travel - ranked #7 of 12. Expect around -3°C, 108 mm of rain, and roughly 7 days with 6+ hours of sunshine this month.
El Chaltén is Argentina's trekking capital, below the Fitz Roy and Cerro Torre peaks.
September in El Chaltén — the hardest end of the year
At -3°C (26°F) this is proper winter weather in September: layer up and split the day between outdoor highlights and indoor stops.
108 mm of water-equivalent precipitation makes this a snowy month at resort level; what falls stays as snow, with about 7 days with 6+ hours of sunshine and 11.7 hours of daylight.
That is 3.6/10 on the same scale — 7th of 12 months, versus 7/10 for the best month here.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, January is materially better in El Chaltén — 3.4 points higher on the same scale.
Frequently asked
- What is the weather like in El Chaltén in September?
- In September, El Chaltén averages -3°C, 108 mm of rain, and about 7 days with 6+ hours of sunshine. Its climate-comfort score is 3.6/10.
- Is September a good time to visit El Chaltén?
- September earns a 3.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in El Chaltén in September?
- Expect about 108 mm of rain in September. Average humidity is 85% and there are about 7 days with 6+ hours of sunshine.
Curated in El Chaltén
Tickets & experiences
Things to do in El Chaltén
El Chaltén, Argentina. Live activities and tours from GetYourGuide, matched to this destination.