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December Weather in Buenos Aires, Colombia

Last updated: August 23, 2025

In Buenos Aires, Colombia, the average temperature in December hovers around 18°C (65°F). Expect a comfortable range where the minimum can drop to 13°C (55°F) and the maximum can climb to 25°C (78°F). Be prepared for considerable precipitation, with 324 mm (12.8 in) likely over the month, contributing to an average humidity of 82%.

December Temperature in Buenos Aires

In December in Buenos Aires, the average temperature is 18°C (65°F). Maximums can reach 25°C (78°F), while minimums can dip as low as 13°C (55°F). This pleasant climate makes it an ideal time for exploring and enjoying outdoor activities in Buenos Aires.

December Weather in Buenos Aires: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Buenos Aires, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Buenos Aires, December typically has an average temperature of 18°C (65°F), with highs reaching up to 25°C (78°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec656665666665656565656565
Data source: Temperature data for Buenos Aires 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 Buenos Aires

In Buenos Aires in December, the precipitation amount is 324 mm (12.8 in) over a span of 30 days.

December Precipitation Trends in Buenos Aires

The chart displays monthly precipitation patterns in Buenos Aires, 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 Buenos Aires, December typically receives around 324 mm (12.8 inches) of precipitation spread over approximately 30 days.
JanFebMarAprMayJunJulAugSepOctNovDec191280313333315260213174188329335324
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Buenos Aires

In Buenos Aires in December, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

December Average Humidity in Buenos Aires

This chart illustrates the average monthly humidity levels in Buenos Aires, 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 Buenos Aires is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%71%78%81%88%85%75%64%70%80%85%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Buenos Aires

In Buenos Aires in December, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Buenos Aires.

Maximum UV Index Levels in Buenos Aires for December

The chart shows the monthly maximum UV Index (UVI) for Buenos Aires 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 Buenos Aires typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151616171513141414141312
Data source: Buenos Aires 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 Buenos Aires Compares to Other Months

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

This table compares monthly weather conditions in Buenos Aires, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (65°F)191 mm (7.5 inches)74%extreme
February Weather19°C (66°F)280 mm (11.0 inches)71%extreme
March Weather19°C (66°F)313 mm (12.3 inches)78%extreme
April Weather19°C (66°F)333 mm (13.1 inches)81%extreme
May Weather19°C (66°F)315 mm (12.4 inches)88%extreme
June Weather18°C (66°F)260 mm (10.2 inches)85%extreme
July Weather18°C (66°F)213 mm (8.4 inches)75%extreme
August Weather18°C (66°F)174 mm (6.8 inches)64%extreme
September Weather18°C (65°F)188 mm (7.4 inches)69%extreme
October Weather18°C (65°F)329 mm (13.0 inches)80%extreme
November Weather18°C (65°F)335 mm (13.2 inches)85%extreme
December Weather18°C (65°F)324 mm (12.8 inches)82%extreme

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