December Weather in Belen, Bolivia

Last updated: August 22, 2025

In Belen, Bolivia, the average temperature in December hovers around 9°C (48°F), with a comfortable range that can dip to a minimum of 2°C (35°F) and peak at a delightful 20°C (68°F). Prepare for some rain, as you can expect about 140 mm (5.5 in) of precipitation over 25 days, contributing to an average humidity level of 87%.

December Temperature in Belen

In December in Belen, the average temperature is 9°C (48°F), with maximums reaching 20°C (68°F) and minimums dropping as low as 2°C (35°F). This moderate weather makes it a great time for travelers to enjoy outdoor activities while dressing in layers to accommodate the temperature variations.

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

The chart illustrates December temperature patterns in Belen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belen, December typically has an average temperature of 9°C (48°F), with highs reaching up to 20°C (68°F) and lows dropping to around 2°C (35°F).

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

December Precipitation in Belen

In Belen in December, the precipitation amount is 140 mm (5.5 in) over the course of 25 days.

December Precipitation Trends in Belen

The chart displays monthly precipitation patterns in Belen, 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 Belen, December typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 25 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 Belen

In Belen in December humidity is 87%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and requiring extra layers and careful planning for any activities.

December Average Humidity in Belen

This chart illustrates the average monthly humidity levels in Belen, 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 Belen is approximately 87%, 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 Belen

In Belen in December, the maximum UV index reaches 19, which corresponds to an extreme exposure category. With a time to burn of just 10 minutes, it’s essential to take precautions. For detailed information, you can check the hourly UV index in Belen.

Maximum UV Index Levels in Belen for December

The chart shows the monthly maximum UV Index (UVI) for Belen 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 Belen typically reaches 19, which falls under the extreme exposure category.

Data source: Belen 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 Belen Compares to Other Months

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

This table compares monthly weather conditions in Belen, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	117 mm (4.6 inches)	91%	extreme
February Weather	8°C (47°F)	155 mm (6.1 inches)	91%	extreme
March Weather	8°C (46°F)	121 mm (4.7 inches)	91%	extreme
April Weather	8°C (46°F)	43 mm (1.7 inches)	88%	extreme
May Weather	6°C (44°F)	22 mm (0.9 inches)	87%	extreme
June Weather	5°C (41°F)	13 mm (0.5 inches)	79%	very high
July Weather	5°C (41°F)	9 mm (0.3 inches)	64%	extreme
August Weather	6°C (43°F)	16 mm (0.6 inches)	62%	extreme
September Weather	7°C (45°F)	33 mm (1.3 inches)	70%	extreme
October Weather	8°C (48°F)	53 mm (2.1 inches)	75%	extreme
November Weather	10°C (50°F)	62 mm (2.5 inches)	84%	extreme
December Weather	9°C (48°F)	140 mm (5.5 inches)	87%	extreme