December Weather in El Rosario, El Salvador

Last updated: August 23, 2025

In El Rosario, El Salvador, the average temperature in December hovers around 26°C (79°F), creating a pleasant climate for both locals and visitors. Expect minimums of 20°C (68°F) and maximums reaching 32°C (90°F). While you're enjoying the warmth, prepare for a touch of humidity with an average of 66%. Precipitation is light, with an average of only 7 mm (0.3 in) over just 1 day, making it an ideal time for outdoor activities!

December Temperature in El Rosario

In December in El Rosario, the average temperature is 26°C (79°F). Maximums can reach 32°C (90°F) and minimums can be as low as 20°C (68°F). This pleasant climate makes El Rosario an ideal destination for travelers seeking warm weather and outdoor activities.

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 26°C (79°F), with highs reaching up to 32°C (90°F) and lows dropping to around 20°C (68°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 7 mm (0.3 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 7 mm (0.3 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 66%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making outdoor activities invigorating yet requiring occasional breaks in the shade to stay comfortable while traveling.

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 66%, 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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very 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	26°C (79°F)	3 mm (0.1 inches)	63%	extreme
February Weather	26°C (80°F)	5 mm (0.2 inches)	62%	extreme
March Weather	27°C (81°F)	7 mm (0.3 inches)	59%	extreme
April Weather	27°C (81°F)	45 mm (1.8 inches)	59%	extreme
May Weather	27°C (80°F)	287 mm (11.3 inches)	59%	extreme
June Weather	26°C (80°F)	316 mm (12.4 inches)	68%	extreme
July Weather	27°C (81°F)	145 mm (5.7 inches)	77%	extreme
August Weather	27°C (80°F)	256 mm (10.1 inches)	79%	extreme
September Weather	26°C (79°F)	290 mm (11.4 inches)	77%	extreme
October Weather	26°C (79°F)	349 mm (13.7 inches)	77%	extreme
November Weather	26°C (79°F)	74 mm (2.9 inches)	75%	very high
December Weather	26°C (79°F)	7 mm (0.3 inches)	66%	very high