nomadseason

December Weather in Buenos Aires, Peru

Last updated: August 27, 2025

In Buenos Aires, Peru, the average temperature in December hovers around 25°C (77°F). However, temperatures can vary, dipping as low as 19°C (66°F) and soaring to a warm 33°C (91°F). During this month, expect an average precipitation of 182 mm (7.2 in) spread across 25 days, with an average humidity of a balmy 89%.

December Temperature in Buenos Aires

In December in Buenos Aires, the average temperature is 25°C (77°F). The maximum can reach 33°C (91°F), while the minimum can be as low as 19°C (66°F). This pleasant climate makes Buenos Aires an ideal destination for outdoor activities and exploring the local attractions.

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 25°C (77°F), with highs reaching up to 33°C (91°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec767675757574737576767777
Data source: Temperature data for Buenos Aires generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 182 mm (7.2 in) over the course of 25 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 182 mm (7.2 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec222191316266222153126103143220249182
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Buenos Aires

In Buenos Aires in December humidity is 89%. With an average temperature of 25°C (77°F), this humidity feels like a heavy blanket that clings to your skin, making even short walks feel like a test of endurance for travelers.

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 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%76%81%86%86%70%47%37%42%62%76%89%
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 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 Buenos Aires, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151616161312111214151414
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 Weather24°C (76°F)222 mm (8.7 inches)80%extreme
February Weather25°C (77°F)191 mm (7.5 inches)76%extreme
March Weather24°C (76°F)316 mm (12.4 inches)81%extreme
April Weather24°C (76°F)266 mm (10.5 inches)86%extreme
May Weather24°C (75°F)222 mm (8.7 inches)86%extreme
June Weather24°C (75°F)153 mm (6.0 inches)70%extreme
July Weather23°C (74°F)126 mm (4.9 inches)47%extreme
August Weather24°C (75°F)103 mm (4.1 inches)37%extreme
September Weather24°C (76°F)143 mm (5.6 inches)42%extreme
October Weather25°C (76°F)220 mm (8.6 inches)62%extreme
November Weather25°C (77°F)249 mm (9.8 inches)76%extreme
December Weather25°C (77°F)182 mm (7.2 inches)89%extreme

Compare Buenos Aires's Climate with Cities Worldwide