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December Weather in Rio Branco, Uruguay

Last updated: August 28, 2025

In Rio Branco, Uruguay, the average temperature in December hovers around 22°C (73°F), offering a pleasant climate. However, be prepared for temperature fluctuations, with minimums dipping to 7°C (46°F) and maximums soaring to 37°C (98°F). During this month, expect 67 mm (2.6 in) of precipitation spread over approximately 7 days. With an average humidity level of 77%, the air might feel a bit damp, so pack accordingly!

December Temperature in Rio Branco

In December in Rio Branco, the average temperature is 22°C (73°F), with maximums reaching 37°C (98°F) and minimums dropping as low as 7°C (46°F). This varied climate makes Rio Branco an ideal destination for travelers seeking to enjoy both warm and cooler experiences.

December Weather in Rio Branco: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rio Branco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Branco, December typically has an average temperature of 22°C (73°F), with highs reaching up to 37°C (98°F) and lows dropping to around 7°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec767471676056545660646972
Data source: Temperature data for Rio Branco 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 Rio Branco

In Rio Branco in December, the total precipitation amount is 67 mm (2.6 in) over a span of 7 days.

December Precipitation Trends in Rio Branco

The chart displays monthly precipitation patterns in Rio Branco, 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 Rio Branco, December typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec130103717883100961171511357367
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rio Branco

In Rio Branco in December, humidity is 77%. With an average temperature of 22°C (73°F), this humidity feels like a warm, sticky embrace, making travel a bit uncomfortable but manageable as you explore the sights while seeking shade and refreshing drinks.

December Average Humidity in Rio Branco

This chart illustrates the average monthly humidity levels in Rio Branco, 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 Rio Branco is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%74%76%82%87%86%81%78%82%82%79%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rio Branco

In Rio Branco 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 Rio Branco, you can check here.

Maximum UV Index Levels in Rio Branco for December

The chart shows the monthly maximum UV Index (UVI) for Rio Branco 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 Rio Branco typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141312854469111314
Data source: Rio Branco 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 Rio Branco Compares to Other Months

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

This table compares monthly weather conditions in Rio Branco, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)130 mm (5.1 inches)71%extreme
February Weather23°C (74°F)103 mm (4.0 inches)74%extreme
March Weather22°C (71°F)71 mm (2.8 inches)76%extreme
April Weather20°C (67°F)78 mm (3.1 inches)81%very high
May Weather15°C (60°F)83 mm (3.3 inches)87%moderate
June Weather13°C (57°F)100 mm (3.9 inches)86%moderate
July Weather12°C (55°F)96 mm (3.8 inches)81%moderate
August Weather13°C (56°F)117 mm (4.6 inches)78%high
September Weather16°C (60°F)151 mm (5.9 inches)82%very high
October Weather18°C (64°F)135 mm (5.3 inches)82%extreme
November Weather20°C (69°F)73 mm (2.9 inches)79%extreme
December Weather22°C (73°F)67 mm (2.6 inches)77%extreme

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