December Weather in Las Mercedes, Mexico

Last updated: August 27, 2025

In Las Mercedes, Mexico, the average temperature in December hovers around 15°C (59°F). During this month, temperatures can swing from a chilly -4°C (25°F) to a warm 31°C (87°F). Expect a modest precipitation of 13 mm (0.5 in) over about 1 day, and a notable average humidity of 84%, creating a uniquely vibrant atmosphere.

December Temperature in Las Mercedes

In December in Las Mercedes, the average temperature is 15°C (59°F). Maximum temperatures can reach 31°C (87°F), while minimums can drop as low as -4°C (25°F). Be sure to pack for a variety of weather conditions when traveling during this time.

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

The chart illustrates December temperature patterns in Las Mercedes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Las Mercedes, December typically has an average temperature of 15°C (59°F), with highs reaching up to 31°C (87°F) and lows dropping to around -4°C (25°F).

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

December Precipitation in Las Mercedes

In Las Mercedes in December, the precipitation amount is 13 mm (0.5 in) over the course of 1 day.

December Precipitation Trends in Las Mercedes

The chart displays monthly precipitation patterns in Las 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 Las Mercedes, December typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 1 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Las Mercedes

In Las Mercedes in December, humidity is 84%. With an average temperature of 15°C (59°F), this humidity feels like an oppressive blanket wrapping around you, making it challenging to enjoy outdoor activities and travel comfortably.

December Average Humidity in Las Mercedes

This chart illustrates the average monthly humidity levels in Las 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 Las Mercedes is approximately 84%, 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 Las Mercedes

In Las Mercedes in December, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Las Mercedes.

Maximum UV Index Levels in Las Mercedes for December

The chart shows the monthly maximum UV Index (UVI) for Las 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 Las Mercedes typically reaches 7, which falls under the high exposure category.

Data source: Las 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 Las Mercedes Compares to Other Months

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

This table compares monthly weather conditions in Las Mercedes, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	14°C (58°F)	6 mm (0.2 inches)	70%	high
February Weather	17°C (64°F)	8 mm (0.3 inches)	62%	very high
March Weather	21°C (69°F)	7 mm (0.3 inches)	53%	extreme
April Weather	24°C (75°F)	4 mm (0.2 inches)	48%	extreme
May Weather	27°C (80°F)	7 mm (0.3 inches)	52%	extreme
June Weather	27°C (81°F)	31 mm (1.2 inches)	64%	extreme
July Weather	26°C (78°F)	76 mm (3.0 inches)	73%	extreme
August Weather	26°C (79°F)	41 mm (1.6 inches)	71%	extreme
September Weather	23°C (74°F)	95 mm (3.7 inches)	82%	extreme
October Weather	22°C (71°F)	39 mm (1.6 inches)	83%	extreme
November Weather	18°C (64°F)	6 mm (0.2 inches)	82%	very high
December Weather	15°C (59°F)	13 mm (0.5 inches)	84%	high