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December Weather in Belen, Uruguay

Last updated: August 28, 2025

In December, the average temperature in Belen, Uruguay hovers around 25°C (77°F), making it a pleasant time to visit. Temperatures can fluctuate with a minimum of 9°C (48°F) and a scorching maximum of 39°C (102°F). Be prepared for some rain, as you'll encounter approximately 71 mm (2.8 in) of precipitation over 6 days. With an average humidity of 68%, the atmosphere can feel quite humid, so pack accordingly!

December Temperature in Belen

In December in Belen, the average temperature is 25°C (77°F). Maximum temperatures can reach 39°C (102°F), while minimums can dip as low as 9°C (48°F). This variation makes it essential for travelers to pack both light clothing for the heat and warmer layers for cooler evenings.

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 25°C (77°F), with highs reaching up to 39°C (102°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec797773686157555863677376
Data source: Temperature data for Belen generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Belen

In Belen in December, the precipitation amount is 71 mm (2.8 in) over a span of 6 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 71 mm (2.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec129109101102132102631071331368771
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Belen

In Belen in December, humidity is 68%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace that can quickly become stifling for traveling, making outdoor activities feel more strenuous and the air thick and heavy.

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 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec59%57%69%78%82%81%66%54%61%59%58%68%
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 is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Belen, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151312964579121414
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.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)129 mm (5.1 inches)59%extreme
February Weather25°C (77°F)109 mm (4.3 inches)56%extreme
March Weather23°C (73°F)101 mm (4.0 inches)69%extreme
April Weather20°C (69°F)102 mm (4.0 inches)78%very high
May Weather16°C (61°F)132 mm (5.2 inches)82%high
June Weather14°C (57°F)102 mm (4.0 inches)81%moderate
July Weather13°C (55°F)63 mm (2.5 inches)66%moderate
August Weather14°C (58°F)107 mm (4.2 inches)54%high
September Weather17°C (63°F)133 mm (5.2 inches)60%very high
October Weather19°C (67°F)136 mm (5.3 inches)59%extreme
November Weather23°C (73°F)87 mm (3.4 inches)57%extreme
December Weather25°C (77°F)71 mm (2.8 inches)68%extreme

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