December Weather in Vallenar, Chile

Last updated: August 22, 2025

In Vallenar, Chile, the average temperature in December hovers around 19°C (66°F), providing a pleasant backdrop for outdoor activities. Expect minimum temperatures to dip to 10°C (51°F), while the mercury can climb to a maximum of 29°C (85°F). With 0 mm (0.0 in) of precipitation across 0 days, the month is dry and ideal for enjoying the outdoors. Adding to the comfort, the average humidity stands at a refreshing 47%.

December Temperature in Vallenar

In December in Vallenar, the average temperature is 19°C (66°F). The maximum can reach 29°C (85°F), while the minimum can be as low as 10°C (51°F). This mild climate makes Vallenar an ideal destination for travelers looking to enjoy outdoor activities and comfortable weather.

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

The chart illustrates December temperature patterns in Vallenar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vallenar, December typically has an average temperature of 19°C (66°F), with highs reaching up to 29°C (85°F) and lows dropping to around 10°C (51°F).

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

December Precipitation in Vallenar

In Vallenar in December, the precipitation amount is 0 mm (0.0 in) during 0 days.

December Precipitation Trends in Vallenar

The chart displays monthly precipitation patterns in Vallenar, 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 Vallenar, December typically receives around 0 mm (0.0 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 Vallenar

In Vallenar in December, humidity is 47%. With an average temperature of 19°C (66°F), this humidity feels like a comfortable embrace, making it pleasant for traveling as you explore the sights without feeling overheated.

December Average Humidity in Vallenar

This chart illustrates the average monthly humidity levels in Vallenar, 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 Vallenar is approximately 47%, 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 Vallenar

In Vallenar in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Vallenar.

Maximum UV Index Levels in Vallenar for December

The chart shows the monthly maximum UV Index (UVI) for Vallenar 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 Vallenar typically reaches 15, which falls under the extreme exposure category.

Data source: Vallenar 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 Vallenar Compares to Other Months

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

This table compares monthly weather conditions in Vallenar, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (69°F)	0 mm (0.0 inches)	56%	extreme
February Weather	20°C (69°F)	0 mm (0.0 inches)	59%	extreme
March Weather	19°C (66°F)	0 mm (0.0 inches)	63%	extreme
April Weather	17°C (62°F)	2 mm (0.1 inches)	61%	very high
May Weather	14°C (57°F)	9 mm (0.4 inches)	62%	high
June Weather	12°C (53°F)	14 mm (0.6 inches)	60%	moderate
July Weather	12°C (53°F)	2 mm (0.1 inches)	62%	high
August Weather	13°C (55°F)	2 mm (0.1 inches)	59%	high
September Weather	14°C (58°F)	1 mm (0.0 inches)	52%	very high
October Weather	16°C (62°F)	0 mm (0.0 inches)	48%	extreme
November Weather	18°C (64°F)	0 mm (0.0 inches)	46%	extreme
December Weather	19°C (66°F)	0 mm (0.0 inches)	47%	extreme