December Weather in El Rosario, Mexico

Last updated: August 27, 2025

In December, the average temperature in El Rosario, Mexico hovers around 18°C (65°F), making it a pleasant time to visit. Expect temperatures to range from a cool 6°C (43°F) at night to a warm 32°C (89°F) during the day. The region experiences a moderate precipitation of 17 mm (0.7 in) over approximately 1 day, coupled with an average humidity of 74%, creating a refreshing atmosphere.

December Temperature in El Rosario

In December in El Rosario, the average temperature is 18°C (65°F). Maximums can reach 32°C (89°F), and minimums can be as low as 6°C (43°F). Be prepared for a range of weather conditions while traveling during this month.

December Weather in El Rosario: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in El Rosario, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In El Rosario, December typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (89°F) and lows dropping to around 6°C (43°F).

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

December Precipitation in El Rosario

In El Rosario in December, the precipitation amount is 17 mm (0.7 in) over the course of 1 day.

December Precipitation Trends in El Rosario

The chart displays monthly precipitation patterns in El Rosario, 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 El Rosario, December typically receives around 17 mm (0.7 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 El Rosario

In El Rosario in December humidity is 74%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can make even short walks feel laborious, leading travelers to seek shade and refreshment more often.

December Average Humidity in El Rosario

This chart illustrates the average monthly humidity levels in El Rosario, 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 El Rosario is approximately 74%, 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 El Rosario

In El Rosario 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 El Rosario.

Maximum UV Index Levels in El Rosario for December

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

Data source: El Rosario 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 El Rosario Compares to Other Months

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

This table compares monthly weather conditions in El Rosario, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (65°F)	13 mm (0.5 inches)	64%	very high
February Weather	19°C (66°F)	23 mm (0.9 inches)	57%	extreme
March Weather	21°C (70°F)	2 mm (0.1 inches)	46%	extreme
April Weather	22°C (72°F)	1 mm (0.0 inches)	42%	extreme
May Weather	23°C (74°F)	11 mm (0.4 inches)	51%	extreme
June Weather	24°C (75°F)	110 mm (4.3 inches)	74%	extreme
July Weather	23°C (73°F)	218 mm (8.6 inches)	79%	extreme
August Weather	23°C (73°F)	230 mm (9.0 inches)	81%	extreme
September Weather	22°C (72°F)	259 mm (10.2 inches)	84%	extreme
October Weather	22°C (72°F)	101 mm (4.0 inches)	75%	extreme
November Weather	20°C (69°F)	19 mm (0.7 inches)	71%	very high
December Weather	18°C (65°F)	17 mm (0.7 inches)	74%	high