December Weather in Rio Grande, Mexico

Last updated: August 27, 2025

In Rio Grande, Mexico, the average temperature in December hovers around 15°C (60°F), offering a pleasant climate for outdoor activities. Expect a minimum temperature of 1°C (34°F) and a maximum of 29°C (85°F), giving a nice range for those who enjoy both cool and warm conditions. Precipitation is minimal, with about 3 mm (0.1 in) spread over 0 days, ensuring ample sunshine. With an average humidity of 81%, you might want to keep that light jacket handy!

December Temperature in Rio Grande

In December in Rio Grande, the average temperature is 15°C (60°F). The maximum can reach 29°C (85°F), while the minimum can be as low as 1°C (34°F). This diverse climate makes Rio Grande an ideal destination for travelers seeking a mix of warm and cool weather experiences.

December Weather in Rio Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rio Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Grande, December typically has an average temperature of 15°C (60°F), with highs reaching up to 29°C (85°F) and lows dropping to around 1°C (34°F).

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

December Precipitation in Rio Grande

In Rio Grande in December, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

December Precipitation Trends in Rio Grande

The chart displays monthly precipitation patterns in Rio Grande, 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 Rio Grande, December typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 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 Rio Grande

In Rio Grande in December, humidity is 81%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sluggish and draining, which can challenge even the best-prepared traveler.

December Average Humidity in Rio Grande

This chart illustrates the average monthly humidity levels in Rio Grande, 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 Rio Grande 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 Rio Grande

In Rio Grande 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 Rio Grande.

Maximum UV Index Levels in Rio Grande for December

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

Data source: Rio Grande 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 Rio Grande Compares to Other Months

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

This table compares monthly weather conditions in Rio Grande, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (60°F)	6 mm (0.2 inches)	74%	very high
February Weather	18°C (64°F)	10 mm (0.4 inches)	65%	extreme
March Weather	21°C (69°F)	6 mm (0.2 inches)	58%	extreme
April Weather	22°C (73°F)	3 mm (0.1 inches)	58%	extreme
May Weather	24°C (75°F)	31 mm (1.2 inches)	67%	extreme
June Weather	22°C (72°F)	145 mm (5.7 inches)	76%	extreme
July Weather	20°C (68°F)	203 mm (8.0 inches)	67%	extreme
August Weather	20°C (68°F)	175 mm (6.9 inches)	68%	extreme
September Weather	20°C (68°F)	175 mm (6.9 inches)	81%	extreme
October Weather	19°C (67°F)	65 mm (2.6 inches)	83%	extreme
November Weather	17°C (64°F)	24 mm (0.9 inches)	84%	very high
December Weather	15°C (60°F)	3 mm (0.1 inches)	81%	very high