December Weather in Bernal, Mexico

Last updated: August 26, 2025

In December, the average temperature in Bernal, Mexico hovers around 15°C (59°F). Expect a range where the minimum dips to -1°C (31°F) and the maximum can reach 29°C (84°F). Overall, precipitation is light, averaging just 6 mm (0.2 in) over 1 day. The humidity tends to be on the higher side, averaging 81%, making for a refreshingly moist atmosphere.

December Temperature in Bernal

In December in Bernal, the average temperature is 15°C (59°F). Maximums can reach 29°C (84°F), while minimums can drop as low as -1°C (31°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates December temperature patterns in Bernal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bernal, December typically has an average temperature of 15°C (59°F), with highs reaching up to 29°C (84°F) and lows dropping to around -1°C (31°F).

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

December Precipitation in Bernal

In Bernal in December, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

December Precipitation Trends in Bernal

The chart displays monthly precipitation patterns in Bernal, 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 Bernal, December typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 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 Bernal

In Bernal in December humidity is 81%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket draped over you, making traveling quite uncomfortable as you constantly wipe away beads of sweat and feel the stickiness clinging to your clothes.

December Average Humidity in Bernal

This chart illustrates the average monthly humidity levels in Bernal, 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 Bernal is approximately 81%, 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 Bernal

In Bernal 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 Bernal.

Maximum UV Index Levels in Bernal for December

The chart shows the monthly maximum UV Index (UVI) for Bernal 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 Bernal typically reaches 8, which falls under the very high exposure category.

Data source: Bernal 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 Bernal Compares to Other Months

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

This table compares monthly weather conditions in Bernal, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (58°F)	6 mm (0.2 inches)	74%	very high
February Weather	17°C (63°F)	7 mm (0.3 inches)	65%	extreme
March Weather	19°C (67°F)	14 mm (0.6 inches)	58%	extreme
April Weather	22°C (71°F)	17 mm (0.7 inches)	58%	extreme
May Weather	23°C (73°F)	45 mm (1.8 inches)	67%	extreme
June Weather	21°C (70°F)	126 mm (5.0 inches)	76%	extreme
July Weather	20°C (69°F)	86 mm (3.4 inches)	67%	extreme
August Weather	21°C (69°F)	78 mm (3.1 inches)	68%	extreme
September Weather	19°C (67°F)	122 mm (4.8 inches)	81%	extreme
October Weather	18°C (65°F)	57 mm (2.3 inches)	83%	extreme
November Weather	16°C (61°F)	20 mm (0.8 inches)	84%	very high
December Weather	15°C (59°F)	6 mm (0.2 inches)	81%	very high