El Chaltén weather / December
El Chaltén weather in December10 years of days, one by one
The longest days of the year, and plenty of wind. In town, highs are around 14°C and lows around 6°C; about 160 mm falls over 17 days with some rain, and there are 16.2 hours of daylight. At Laguna de los Tres, of 31 days usually 10 are calm, 10 windy and 11 very windy.
High / lowtown
14° / 6°
Rain17 days
160 mm
Gusts over 60 km/htown
10 days
Calm daysLaguna de los Tres
10 of 31
Daylightper day
16.2 h
December, day by day
In how many of the last 10 years each day of December 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.
- 15/10
- 25/10
- 34/10
- 44/10
- 53/10
- 66/10
- 74/10
- 83/10
- 92/10
- 105/10
- 112/10
- 121/10
- 132/10
- 143/10
- 152/10
- 164/10
- 173/10
- 184/10
- 195/10
- 202/10
- 213/10
- 222/10
- 232/10
- 242/10
- 253/10
- 262/10
- 271/10
- 283/10
- 294/10
- 301/10
- 313/10
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.
December, year by year
| Year | Calm / windy / very windy days | Fitz Roy clear | Rain | Snow days | Top gust at the lake | Warmest / coldest |
|---|---|---|---|---|---|---|
| 2025 | 8 / 9 / 14 | 0 days | 191 mm24 days | 0 | 122 km/h | 17° / 3° |
| 2024 | 19 / 9 / 3 | 9 days | 66 mm11 days | 0 | 90 km/h | 26° / 1° |
| 2023 | 18 / 9 / 4 | 8 days | 85 mm12 days | 0 | 90 km/h | 21° / 0° |
| 2022 | 5 / 13 / 13 | 1 days | 127 mm15 days | 0 | 121 km/h | 22° / 4° |
| 2021 | 12 / 10 / 9 | 6 days | 93 mm12 days | 0 | 89 km/h | 26° / 2° |
| 2020 | 10 / 9 / 12 | 2 days | 128 mm17 days | 0 | 139 km/h | 20° / 0° |
| 2019 | 5 / 14 / 12 | 2 days | 206 mm20 days | 0 | 124 km/h | 18° / 4° |
| 2018 | 8 / 8 / 15 | 4 days | 105 mm13 days | 0 | 137 km/h | 21° / 0° |
| 2017 | 4 / 7 / 20 | 6 days | 183 mm22 days | 0 | 126 km/h | 21° / 2° |
| 2016 | 6 / 13 / 12 | 1 days | 414 mm25 days | 0 | 102 km/h | 14° / 2° |
December records
- The warmest day
- 26.1° 16 December 2024
- The coldest night
- -0.3° 1 December 2023
- The strongest gust at Laguna de los Tres
- 139 km/h 23 December 2020
- The wettest day
- 68.9 mm 18 December 2016
From 2016 to 2025, in town except the gust.
Coming in December? 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 December
What is El Chaltén weather like in December?
In December highs in town are around 14°C and lows around 6°C. About 160 mm falls over some 17 days with rain, mostly drizzle or short showers. There are 16.2 hours of daylight. Up at Laguna de los Tres (1,170 m) it is about 5° colder.
Is El Chaltén windy in December?
In town there are about 10 days with gusts over 60 km/h. At Laguna de los Tres, from 2016 to 2025, December had on average 10 calm days (gusts under 50 km/h), 10 windy and 11 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 December?
Fully clear at summit height, December had on average 4 days from 2016 to 2025. 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 December?
In town, almost never in December. On the high trails it can snow any month, though in summer it does not last.