Last updated: August 21, 2025
December in Ushuaia, Argentina offers a unique climate experience, characterized by mild temperatures that range from a maximum of 19°C (66°F) to a minimum of -2°C (28°F). The average temperature hovers around 8°C (46°F), making it a pleasant time for outdoor adventures. Visitors should be prepared for a wet month, as 99 mm (3.9 in) of precipitation falls over 23 days, contributing to the region's lush landscapes. With an average humidity of 82%, December in Ushuaia showcases the dynamic weather patterns that define this southernmost city, creating a captivating blend of seasonal beauty and adventure.
In Ushuaia, Argentina, December marks the transition into summer, offering a refreshing respite from the frigid winter months. As the temperatures rise, the minimum settles at a cool -2°C (28°F), while the average temperature hovers around a comfortable 8°C (46°F), peaking at a max of 19°C (66°F). This gradual warming signals a delightful shift, with temperatures consistently inching upwards throughout the late spring and early summer months. Comparatively, December's highs are considerably warmer than the preceding months, creating an inviting atmosphere for outdoor adventures and exploration in this captivating region. The emerging warmth not only heralds longer days but also the vibrant natural beauty that Ushuaia's unique landscape has to offer.
In Ushuaia, Argentina, December marks a notable transition as precipitation begins to ramp up, with 99 mm (3.9 in) of rain spread across 23 days. This increase in rainfall represents a shift from the relatively drier months preceding it, particularly May and June, which saw significantly lower totals. As the year draws to a close, December's wet spell showcases a trend of heightened moisture that carries into the summer months, suggesting a vibrant and lush environment as the festive season approaches. The frequent rain days during this month hint at the lively, ever-changing weather, making Ushuaia's December a dynamic blend of beauty and challenge for both residents and visitors alike.
In Ushuaia, Argentina, December marks a subtle shift in humidity, with levels dropping to 82%. This decrease signals the end of a year characterized by consistently high humidity, peaking at 86% from April to June. The trend shows a gradual decline as the calendar year progresses, starting from 83% in January and reducing to December's milder levels. Throughout the summer months, humidity remains relatively stable, hovering between 83% and 85%. This gradual tapering suggests a welcome relief from the more humid conditions experienced in the earlier months, making December an ideal time to explore the stunning landscapes of this southernmost city.
As December rolls into Ushuaia, Argentina, the UV Index soars to 11, marking it as an extreme exposure month with a burn time of just 10 minutes. This spike follows a gradual climb from the lower indices experienced in the preceding months, highlighting a distinct trend of increasing solar intensity as summer approaches. Notably, the UV Index in November peaked at 12, and while it slightly dips in December, the extreme category remains ionizing. This pattern emphasizes the importance of sun protection, especially during these vibrant summer days. For a detailed look at UV levels throughout the year, visit Ushuaia UV Index.
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In December, Ushuaia basks in the glory of 310 hours of sunshine, marking the pinnacle of daylight hours for the year. This festive month stands in stark contrast to the winter darkness of June, which sees a mere 85 hours of sunlight. The trend towards longer days begins in October with 260 hours, and steadily climbs, peaking in December. Following this sun-soaked month, the light begins to wane as January and February maintain robust but slightly reduced totals of 224 and 225 hours, respectively. This annual pattern highlights Ushuaia's unique position at the southernmost tip of Argentina, where the long summer days create a vibrant atmosphere for outdoor adventures and festive celebrations amid breathtaking landscapes.
In Ushuaia, Argentina, the likelihood of sunny weather in December peaks at 33%, making it one of the brighter months of the year. This upward trend in sunshine begins in the spring, with the chance of sunny days gradually increasing from 21% in May to a more promising 32% in October and November before reaching its zenith in December. As summer approaches, this seasonal shift not only offers more daylight but also enhances the overall outdoor experience in this picturesque locale. With the festive spirit in the air, December promises a delightful blend of sunshine and holiday cheer for those visiting this stunning destination at the southern tip of South America.
As the year comes to a close, Ushuaia, Argentina, basks in the beauty of December, enjoying a remarkable 17 hours of daylight. This increase marks a significant rise from the shorter days of winter, where June and July see a mere 7 hours of light. The progression from a modest 8 hours in May to the vibrant 16 hours in November creates a noticeable shift in the atmosphere, inviting both locals and visitors to embrace outdoor activities. The gradual ascent in daylight hours not only highlights the contrast between the frigid winter months but also ushers in the warmth of summer, making December a time of renewal and celebration in this southernmost city.
As December rolls into Ushuaia, the average wind speed picks up slightly to 3.1 m/s (7 mph), making it one of the breezier months of the year. This modest increase follows a trend observed in the spring and early summer months, where October and November also feature average speeds of 3.2 m/s (7 mph). After a gradual decline in windiness during the colder months, which dipped as low as 1.9 m/s (4 mph) in June, December's winds prepare the region for the vibrant energy of summer. Although not particularly fierce, the winds of December help to energize the picturesque landscapes, lending a crispness to the air that complements Ushuaia's stunning scenery.
Weather in Ushuaia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ushuaia, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, Ushuaia experiences a range of temperatures, with a minimum of -2°C (28°F) and a maximum of 19°C (66°F), averaging around 8°C (46°F). The month sees approximately 99 mm (3.9 in) of precipitation over 23 days, accompanied by a humidity level of 82%. In contrast, January brings slightly milder conditions, with a minimum temperature of -1°C (31°F) and a maximum of 20°C (69°F), while the average remains similar at 8°C (47°F). Rainfall increases slightly to 102 mm (4.0 in) over 22 days, and humidity rises to 83%. For a more detailed look at January weather in Ushuaia, visit Ushuaia weather in January.
In December, the weather in Ushuaia typically sees temperatures ranging from a minimum of -2°C (28°F) to a maximum of 19°C (66°F), with an average of 8°C (46°F). The month experiences significant precipitation of 99 mm (3.9 in) over 23 days, coupled with a humidity level of 82%. In contrast, February offers slightly cooler nights, with a minimum temperature of -3°C (27°F), but warmer daytime highs reaching up to 24°C (75°F) and an average of 8°C (47°F). Precipitation in February is slightly lower at 91 mm (3.6 in) over 18 days, with humidity rising to 85%. For a detailed look at Ushuaia's February weather, you can visit Ushuaia weather in February.
In December, the weather features a mild average temperature of 8°C (46°F), with maximum highs reaching 19°C (66°F) and minimum lows around -2°C (28°F). This month sees about 99 mm (3.9 in) of precipitation over 23 days, coupled with a humidity level of 82%. In contrast, March experiences slightly cooler conditions, with an average temperature of 7°C (44°F) and maximum temperatures that peak at 17°C (62°F), while minimums drop to -3°C (28°F). Precipitation increases marginally to 102 mm (4.0 in) spread over 19 days, and humidity rises to 85%. For a more detailed look at the weather in March, you can visit Ushuaia weather in March.
In comparing the weather of December and April, we observe notable differences in temperature and precipitation patterns. December experiences milder temperatures, with an average of 8°C (46°F), ranging from a minimum of -2°C (28°F) to a maximum of 19°C (66°F). In contrast, April generally feels cooler, with an average temperature of 4°C (40°F), dipping down to a low of -7°C (19°F) and reaching a maximum of 17°C (63°F). Additionally, December sees more precipitation, tallying 99 mm (3.9 in) across 23 days, whereas April receives about 75 mm (2.9 in) over 18 days. Humidity levels remain relatively high in both months, with December at 82% and April slightly higher at 86%. For more detailed information on the weather in April, you can check this link: Ushuaia weather in April.
December and May present quite different weather patterns. In December, temperatures range from a minimum of -2°C (28°F) to a maximum of 19°C (66°F), with an average of 8°C (46°F). This month sees considerable precipitation, totaling 99 mm (3.9 in) over 23 days, and humidity levels hover around 82%. Conversely, May experiences cooler temperatures, with lows of -11°C (13°F) and highs reaching only 11°C (53°F), leading to an average temperature of 2°C (36°F). Precipitation is lower at 66 mm (2.6 in) over 15 days, accompanied by slightly higher humidity at 86%. For more detailed information, you can check Ushuaia weather in May.
December and June present contrasting weather patterns. In December, temperatures range from a minimum of -2°C (28°F) to a comfortable average of 8°C (46°F), peaking at 19°C (66°F). The month sees significant precipitation at 99 mm (3.9 in) distributed over 23 days, contributing to a humidity level of 82%. In contrast, June experiences colder conditions, with temperatures plunging to a minimum of -13°C (9°F) and averaging -1°C (30°F), while reaching a maximum of only 6°C (43°F). Precipitation is less frequent in June, totaling 46 mm (1.8 in) over 14 days, and humidity is slightly higher at 86%. For more information on the specific weather in June, check Ushuaia weather in June.
When comparing the weather in December to that of July, a notable distinction in temperature can be observed. December typically experiences milder conditions, with temperatures ranging from a minimum of -2°C (28°F) to a pleasant average of 8°C (46°F) and a maximum of 19°C (66°F). In contrast, July is considerably colder, with temperatures dipping to a minimum of -11°C (13°F) and only reaching a maximum of 7°C (45°F), leading to an average of -1°C (30°F).
Precipitation is also more prevalent in December, with 99 mm (3.9 in) over approximately 23 days, compared to July's 51 mm (2.0 in) across 14 days. Humidity levels are fairly similar, with December at 82% and July slightly higher at 85%. For those seeking detailed information on July weather, further insights can be found here: Ushuaia weather in July.
In December, Ushuaia experiences milder temperatures, with averages ranging from a minimum of -2°C (28°F) to a maximum of 19°C (66°F), while August features colder conditions, with temperatures typically between -12°C (11°F) and a maximum of 7°C (45°F). Precipitation in December is slightly higher at 99 mm (3.9 in) over 23 days compared to August's 79 mm (3.1 in) across 18 days. Despite the colder temperatures in August, humidity is marginally higher at 85% compared to December's 82%. For a detailed look at August weather in Ushuaia, you can visit Ushuaia weather in August.
December weather in Ushuaia presents a milder climate with temperatures ranging from a minimum of -2°C (28°F) to a maximum of 19°C (66°F), while the average temperature sits comfortably at 8°C (46°F). In contrast, September experiences colder conditions, with temperatures sliding between a minimum of -11°C (12°F) and a maximum of 10°C (51°F) and an average of just 1°C (34°F). Additionally, December sees more precipitation at 99 mm (3.9 in) over 23 days, compared to September's 64 mm (2.5 in) over 16 days. The humidity remains relatively high in both months, with December at 82% and September slightly higher at 84%. For a closer look at September's climate, visit Ushuaia weather in September.
When comparing the weather in December and October, December tends to be more temperate with average temperatures ranging from a minimum of -2°C (28°F) to a maximum of 19°C (66°F), while October is cooler, with average temperatures from -8°C (18°F) to 14°C (58°F). December also experiences higher precipitation levels at 99 mm (3.9 in) over 23 days, compared to October's 71 mm (2.8 in) over 19 days. Additionally, humidity remains fairly high in both months, with December at 82% and October slightly higher at 83%. For more detailed insights on October weather, you can visit Ushuaia weather in October.
In comparing the weather between November and December, December tends to be slightly milder with average temperatures ranging from a minimum of -2°C (28°F) to a maximum of 19°C (66°F), whereas November has a slightly cooler average temperature range of -3°C (26°F) to 18°C (65°F). Precipitation levels also rise in December, accumulating to 99 mm (3.9 in) over 23 rainy days, compared to November's 86 mm (3.4 in) over 21 days. Humidity remains relatively high in both months, with December at 82% and November at 84%. For more insights into November’s climate specifics, you can check out Ushuaia weather in November.
As December unfolds in Ushuaia, the region experiences a unique transition that sets it apart from the chillier months that precede it. With temperatures gradually rising to a comfortable average of 8°C (46°F), residents and visitors can finally revel in the warmer days, although the nights still hint at the lingering cold with lows dipping to -2°C (28°F). This month is characterized by increased precipitation, averaging 99 mm (3.9 in) over 23 days, making it one of the wetter times of the year, yet the humidity remains relatively high at 82%, contributing to a distinct moist climate. The longer daylight hours invite exploration of the stunning landscapes, creating an inviting atmosphere for outdoor activities. For a deeper understanding of what to expect throughout the year, check out Ushuaia Climate.