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December Weather in Mercedes, Argentina

Last updated: August 22, 2025

In Mercedes, Argentina, the average temperature in December hovers around 23°C (73°F). Expect a range with a minimum of 7°C (45°F) and a scorching maximum of 38°C (101°F). During this time, you can anticipate 77 mm (3.0 in) of precipitation over approximately 7 days, complemented by an average humidity of 56%. Stay prepared for a mix of warmth and occasional rain!

December Temperature in Mercedes

In December in Mercedes, the average temperature is 23°C (73°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 7°C (45°F). This mild to warm climate makes Mercedes an ideal destination for travelers looking to enjoy a range of outdoor activities and pleasant weather.

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

The chart illustrates December temperature patterns in Mercedes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercedes, December typically has an average temperature of 23°C (73°F), with highs reaching up to 38°C (101°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec757369645652505357626873
Data source: Temperature data for Mercedes 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 Mercedes

In Mercedes in December, the precipitation amount is 77 mm (3.0 in) over the course of 7 days.

December Precipitation Trends in Mercedes

The chart displays monthly precipitation patterns in Mercedes, 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 Mercedes, December typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec766377947644444577896577
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mercedes

In Mercedes in December, humidity is 56%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace that makes traveling feel slightly sticky, yet still comfortable enough to explore outdoors without feeling overwhelmed.

December Average Humidity in Mercedes

This chart illustrates the average monthly humidity levels in Mercedes, 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 Mercedes is approximately 56%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%61%66%80%85%80%69%66%72%63%59%56%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Mercedes

In Mercedes 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 Mercedes, you can check here.

Maximum UV Index Levels in Mercedes for December

The chart shows the monthly maximum UV Index (UVI) for Mercedes 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 Mercedes typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311753468101314
Data source: Mercedes 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 Mercedes Compares to Other Months

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

This table compares monthly weather conditions in Mercedes, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)76 mm (3.0 inches)50%extreme
February Weather23°C (73°F)63 mm (2.5 inches)61%extreme
March Weather21°C (69°F)77 mm (3.0 inches)66%extreme
April Weather18°C (64°F)94 mm (3.7 inches)80%high
May Weather13°C (57°F)76 mm (3.0 inches)85%moderate
June Weather11°C (52°F)44 mm (1.7 inches)80%moderate
July Weather10°C (50°F)43 mm (1.7 inches)69%moderate
August Weather12°C (53°F)45 mm (1.8 inches)66%high
September Weather14°C (57°F)77 mm (3.0 inches)72%very high
October Weather16°C (62°F)89 mm (3.5 inches)63%very high
November Weather20°C (69°F)65 mm (2.6 inches)59%extreme
December Weather23°C (73°F)77 mm (3.0 inches)56%extreme

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