El Chaltén weather in September
September in El Chaltén: cold, soaked, with clean air — fine if you can take 18 rainy days.
#7 of 12 months in El Chaltén · #691 of 897 destinations to visit in September · comfort 68/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on El Chaltén in September
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El Chaltén climate normals — September
| Daytime high | 4°C / 39°F | 🧥 cold |
|---|---|---|
| Nighttime low | -1°C / 31°F | |
| Rainfall | 199 mm / 7.8 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | -2°C / 28°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 11.8 h | |
| Wind | 10 km/h / 6 mph | |
| Snowfall | 131.4 cm / 51.7 in | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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El Chaltén in September — FAQ
- Is September a good time to visit El Chaltén?
- September in El Chaltén: cold, soaked, with clean air — fine if you can take 18 rainy days. It ranks #7 of 12 months for El Chaltén on SeasonMap's comfort score (68/100).
- What is the weather like in El Chaltén in September?
- In September, El Chaltén averages a daily high of 4°C and a low of -0.8°C, with about 198.8 mm of rain over roughly 18 rainy days.
- What is the air quality in El Chaltén in September?
- El Chaltén has a mean US Air Quality Index of about 30 in September.
- Does it snow in El Chaltén in September?
- El Chaltén sees roughly 131.4 cm of snowfall in September.