December Weather in Mercedes, Argentina

Last updated: August 22, 2025

In December, the average temperature in Mercedes, Argentina hovers around 25°C (77°F). However, be prepared for a range, as it can drop to a chilly 10°C (51°F) at its lowest and reach a scorching 39°C (102°F) at its peak. Expect 91 mm (3.6 in) of rainfall spread over about 6 days, and note the average humidity is a comfortable 75%.

December Temperature in Mercedes

In December in Mercedes, the average temperature is 25°C (77°F). The maximum can reach 39°C (102°F) and the minimum can be as low as 10°C (51°F). This climate makes Mercedes an ideal destination for travelers seeking warm weather and diverse outdoor activities.

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 25°C (77°F), with highs reaching up to 39°C (102°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Mercedes generated using information from the Copernicus Climate Change Service.

December Precipitation in Mercedes

In Mercedes in December, the precipitation amount is 91 mm (3.6 in) over the course of 6 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 91 mm (3.6 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Mercedes

In Mercedes in December humidity is 75%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket, enveloping you and making travel somewhat taxing, as every step can feel heavier and the air thicker, often leading to a desire for shade and cool breezes.

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 75%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (80°F)	190 mm (7.5 inches)	66%	extreme
February Weather	25°C (78°F)	63 mm (2.5 inches)	61%	extreme
March Weather	23°C (75°F)	104 mm (4.1 inches)	71%	extreme
April Weather	21°C (70°F)	100 mm (3.9 inches)	81%	very high
May Weather	17°C (62°F)	131 mm (5.1 inches)	84%	high
June Weather	15°C (59°F)	68 mm (2.7 inches)	76%	moderate
July Weather	14°C (57°F)	47 mm (1.9 inches)	64%	moderate
August Weather	16°C (61°F)	70 mm (2.7 inches)	46%	high
September Weather	18°C (65°F)	125 mm (4.9 inches)	55%	very high
October Weather	21°C (70°F)	134 mm (5.3 inches)	57%	extreme
November Weather	23°C (74°F)	119 mm (4.7 inches)	59%	extreme
December Weather	25°C (77°F)	91 mm (3.6 inches)	75%	extreme