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December Weather in Avellaneda, Argentina

Last updated: August 22, 2025

In December, the average temperature in Avellaneda, Argentina hovers around 25°C (78°F). Daily highs can soar to 40°C (105°F), while chilly nights may drop to a refreshing 11°C (53°F). Expect 97 mm (3.8 in) of rain over approximately 7 days, alongside an average humidity of 75%, creating a vibrant and dynamic climate.

December Temperature in Avellaneda

In December in Avellaneda, the average temperature is 25°C (78°F). Maximums can reach 40°C (105°F) and minimums can be as low as 11°C (53°F). This makes it a great time to explore Avellaneda, but don’t forget to pack for the varying temperatures!

December Weather in Avellaneda: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Avellaneda, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Avellaneda, December typically has an average temperature of 25°C (78°F), with highs reaching up to 40°C (105°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec807874706258576065707478
Data source: Temperature data for Avellaneda generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Avellaneda

In Avellaneda in December, the precipitation amount is 97 mm (3.8 in) over the course of 7 days.

December Precipitation Trends in Avellaneda

The chart displays monthly precipitation patterns in Avellaneda, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Avellaneda, December typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec1557888931136638521179215797
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Avellaneda

In Avellaneda in December, humidity is 75%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making travel feel sticky and heavy, but also vibrant and alive, as the air is saturated with the scents of the surroundings and the energy of the environment.

December Average Humidity in Avellaneda

This chart illustrates the average monthly humidity levels in Avellaneda, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Avellaneda is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%61%71%81%84%76%64%46%55%57%59%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Avellaneda

In Avellaneda in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Avellaneda, you can check here.

Maximum UV Index Levels in Avellaneda for December

The chart shows the monthly maximum UV Index (UVI) for Avellaneda in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Avellaneda typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412965579121414
Data source: Avellaneda December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Avellaneda Compares to Other Months

Weather in Avellaneda varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Avellaneda, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Avellaneda, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)155 mm (6.1 inches)66%extreme
February Weather26°C (78°F)78 mm (3.1 inches)61%extreme
March Weather24°C (75°F)88 mm (3.5 inches)71%extreme
April Weather21°C (70°F)93 mm (3.7 inches)81%very high
May Weather17°C (63°F)113 mm (4.4 inches)84%high
June Weather14°C (58°F)66 mm (2.6 inches)76%moderate
July Weather14°C (57°F)38 mm (1.5 inches)64%moderate
August Weather16°C (61°F)52 mm (2.0 inches)46%high
September Weather18°C (65°F)117 mm (4.6 inches)55%very high
October Weather21°C (70°F)92 mm (3.6 inches)57%extreme
November Weather24°C (75°F)157 mm (6.2 inches)59%extreme
December Weather25°C (78°F)97 mm (3.8 inches)75%extreme

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