El Chaltén Weather in September
El Chaltén in September averages 3°C (37°F) during the day and -4°C (25°F) at night. This is the driest month of the year.
Rainfall in El Chaltén in September
You can expect the least amount of rain of the year this month. The dry conditions are a bonus, even if the cooler temperatures mean you'll need to dress accordingly. Historically, September sees about 5 days of snow/rain, with a monthly average of 157 mm (6.2 in). The rain this month typically falls in concentrated bursts rather than all-day showers. Expect a few heavier spells rather than constant grey skies.
Temperature in El Chaltén in September
El Chaltén in September gets highs of 3°C (37°F) during the day and drops to -4°C (25°F) at night. Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. At -4°C (25°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating. This month is particularly chilly, so wearing layers is necessary to stay warm and comfortable.
Sunshine in El Chaltén in September
You can expect a moderate amount of sunlight, with approximately 170 hours. This means a pleasant mix of sun and overcast.For more travel ideas, our weather planner can help you explore destinations around the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our El Chaltén's climate page.
El Chaltén Temperature in September
Min Temperature
-4°C (25°F)
Max Temperature
3°C (37°F)
Chance of Rain
17%
Precipitation
157 mm (6.2 in)
Rainy days
5 days
Sunshine
170 hours
Percentage Sunshine
Historical weather for El Chaltén in September
Browse day-by-day weather records for El Chaltén spanning 21 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
El Chaltén historical weather extremes in September
Based on 19 years of weather observations in El Chaltén between 2006 and 2025, these are the recorded extremes.
- El Chaltén recorded its highest September temperature of 9°C (48°F) on September 25, 2012.
- On September 4, 2013, El Chaltén saw its coldest September day with temperatures maxing out at -5°C (23°F).
- Nighttime temperatures dropped to -14°C (7°F) on September 4, 2023, marking the coldest September night on record.
- The wettest day in September El Chaltén was on September 16, 2017 with 66 mm (2.6 in) of precipitation.
Best Places in Argentina in September
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in El Chaltén in September
We recommend to layer up for chilly conditions in El Chaltén in September. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in El Chaltén in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our El Chaltén's climate page.
See the full El Chaltén climate overview or explore weather in Argentina.
