El Chaltén weather / September
El Chaltén weather in September11 years of days, one by one
The end of winter: there is still snow up high and the days stretch fast. In town, highs are around 7°C and lows around -1°C; about 133 mm falls over 15 days with some rain, and there are 11.8 hours of daylight. At Laguna de los Tres, of 30 days usually 13 are calm, 7 windy and 10 very windy.
High / lowtown
7° / -1°
Rain15 days
133 mm
Gusts over 60 km/htown
7 days
Calm daysLaguna de los Tres
13 of 30
Daylightper day
11.8 h
September, day by day
In how many of the last 11 years each day of September was calm at Laguna de los Tres: gusts under 50 km/h and little rain from 8 am to 8 pm. Darker means more calm years.
- 15/11
- 27/11
- 35/11
- 47/11
- 57/11
- 67/11
- 75/11
- 86/11
- 96/11
- 104/11
- 112/11
- 125/11
- 130/11
- 140/11
- 154/11
- 164/11
- 175/11
- 187/11
- 196/11
- 207/11
- 214/11
- 224/11
- 233/11
- 246/11
- 254/11
- 264/11
- 274/11
- 285/11
- 293/11
- 306/11
There is no lucky day: the wind changes from year to year. It shows whether the month is even or gets better towards the end.
September, year by year
| Year | Calm / windy / very windy days | Fitz Roy clear | Rain | Snow days | Top gust at the lake | Warmest / coldest |
|---|---|---|---|---|---|---|
| 2026 | 20 / 7 / 3 | 8 days | 65 mm11 days | 1 | 73 km/h | 10° / -10° |
| 2025 | 18 / 4 / 8 | 11 days | 146 mm11 days | 1 | 102 km/h | 14° / -8° |
| 2024 | 7 / 10 / 13 | 2 days | 156 mm19 days | 1 | 132 km/h | 7° / -11° |
| 2023 | 22 / 4 / 4 | 12 days | 71 mm11 days | 0 | 94 km/h | 9° / -14° |
| 2022 | 10 / 4 / 16 | 5 days | 207 mm15 days | 0 | 137 km/h | 11° / -9° |
| 2021 | 10 / 10 / 10 | 5 days | 84 mm13 days | 0 | 133 km/h | 15° / -3° |
| 2020 | 4 / 12 / 14 | 3 days | 106 mm15 days | 0 | 126 km/h | 9° / -7° |
| 2019 | 13 / 7 / 10 | 9 days | 82 mm14 days | 0 | 102 km/h | 15° / -8° |
| 2018 | 14 / 5 / 11 | 3 days | 147 mm18 days | 2 | 135 km/h | 10° / -9° |
| 2017 | 3 / 11 / 16 | 3 days | 257 mm18 days | 0 | 154 km/h | 13° / -5° |
| 2016 | 21 / 7 / 2 | 12 days | 74 mm14 days | 0 | 77 km/h | 10° / -5° |
September records
- The warmest day
- 14.9° 26 September 2019
- The coldest night
- -13.7° 5 September 2023
- The strongest gust at Laguna de los Tres
- 154 km/h 15 September 2017
- The wettest day
- 72.5 mm 16 September 2017
From 2016 to 2026, in town except the gust.
Coming in September? A week before, the El Chaltén 7-day forecast tells you which day suits each hike and where we have spots. To plan the trip, see the best time to visit El Chaltén and what to pack.
Questions about El Chaltén weather in September
What is El Chaltén weather like in September?
In September highs in town are around 7°C and lows around -1°C. About 133 mm falls over some 15 days with rain, mostly drizzle or short showers. There are 11.8 hours of daylight. Up at Laguna de los Tres (1,170 m) it is about 5° colder.
Is El Chaltén windy in September?
In town there are about 7 days with gusts over 60 km/h. At Laguna de los Tres, from 2016 to 2026, September had on average 13 calm days (gusts under 50 km/h), 7 windy and 10 very windy ones (75 km/h or more, or heavy rain). We go out almost every day even with wind: on the day, the guide decides how far up you go.
Can you see Fitz Roy in September?
Fully clear at summit height, September had on average 7 days from 2016 to 2026. On many other days it shows for a while, through cloud. That is why it pays to have more than one day in El Chaltén and to check the mountain forecast.
Does it snow in El Chaltén in September?
In town, almost never in September. On the high trails it can snow any month, though in summer it does not last.