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December Weather in Buenos Aires, Mexico

Last updated: August 27, 2025

In December, the average temperature in Buenos Aires, Mexico is a delightful 26°C (78°F). You can expect a minimum of 20°C (68°F) and a maximum of 32°C (91°F), making it a perfect time for outdoor activities. With an average humidity of 70% and a light precipitation of just 7 mm (0.3 in) over 1 day, the climate remains comfortable and inviting. Enjoy your stay!

December Temperature in Buenos Aires

In December in Buenos Aires, the average temperature is 26°C (78°F). Maximums can reach 32°C (91°F), and minimums can be as low as 20°C (68°F). This pleasant climate makes it an ideal time for traveling, allowing visitors to enjoy outdoor activities and comfortable evenings.

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 26°C (78°F), with highs reaching up to 32°C (91°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777777981828181808078
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 7 mm (0.3 in) over the course of 1 day.

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 7 mm (0.3 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec54218213143312319266567
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 70%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making outdoor activities slightly sticky and encouraging travelers to stay hydrated while exploring.

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 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%64%63%69%73%76%78%79%78%75%72%70%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141312131198
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 Weather25°C (78°F)5 mm (0.2 inches)66%very high
February Weather25°C (77°F)4 mm (0.2 inches)64%extreme
March Weather25°C (78°F)2 mm (0.1 inches)63%extreme
April Weather25°C (78°F)1 mm (0.1 inches)69%extreme
May Weather26°C (80°F)8 mm (0.3 inches)73%extreme
June Weather27°C (81°F)213 mm (8.4 inches)76%extreme
July Weather28°C (82°F)143 mm (5.6 inches)78%extreme
August Weather27°C (81°F)312 mm (12.3 inches)79%extreme
September Weather27°C (81°F)319 mm (12.5 inches)78%extreme
October Weather27°C (81°F)266 mm (10.5 inches)75%extreme
November Weather26°C (80°F)56 mm (2.2 inches)72%very high
December Weather26°C (78°F)7 mm (0.3 inches)70%very high

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