Ushuaia weather in December 2025

Q: How hot is it in Ushuaia in December?

Daytime temperatures usually reach 28°C in Ushuaia in December with moderate heat and humidity, falling to 18°C at night.

Q: How sunny is it in Ushuaia in December?

There are normally 8 hours of bright sunshine each day in Ushuaia in December - that's 57% of daylight hours.

Q: How warm is the sea around Ushuaia in December?

The average sea temperature around Ushuaia in December is 23°C.

Q: Does it rain in Ushuaia in December?

There are usually 9 days with some rain in Ushuaia in December and the average monthly rainfall is 92mm.

Expect daytime maximum temperatures of 54°F in Ushuaia, Argentina in December based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 1.8 inches of rainfall in the month.

54
54°F max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
37
37°F min night temperature
17
17 hours of daylight per day
0
No heat & humidity
1.8
1.8 inches of monthly rainfall
7
7 (High) UV index
46
46°F sea temperature

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The December weather guide for Argentina (Ushuaia) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)