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December Weather in Rio Brilhante, Brazil

Last updated: August 22, 2025

In December, the average temperature in Rio Brilhante, Brazil reaches a warm 27°C (81°F). However, temperatures can vary significantly, with a minimum of 17°C (62°F) and soaring up to a maximum of 37°C (99°F). Expect 150 mm (5.9 in) of precipitation over approximately 15 days, accompanied by a high average humidity of 81%. Prepare accordingly for both the heat and the shower!

December Temperature in Rio Brilhante

In December in Rio Brilhante, the average temperature is 27°C (81°F), with a maximum that can reach 37°C (99°F) and a minimum that can drop to 17°C (62°F). This makes it an ideal time for travelers looking to enjoy warm weather while still having the option for cooler evenings.

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

The chart illustrates December temperature patterns in Rio Brilhante, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Brilhante, December typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 17°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec808080767169687279797980
Data source: Temperature data for Rio Brilhante 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 Brilhante

In Rio Brilhante in December, the total precipitation amount is 150 mm (5.9 in) over a span of 15 days.

December Precipitation Trends in Rio Brilhante

The chart displays monthly precipitation patterns in Rio Brilhante, 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 Brilhante, December typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec144127117646247137238133118150
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rio Brilhante

In Rio Brilhante in December humidity is 81%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy blanket enveloping you, making travel quite uncomfortable as it can quickly drain your energy and require frequent hydration breaks.

December Average Humidity in Rio Brilhante

This chart illustrates the average monthly humidity levels in Rio Brilhante, 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 Brilhante is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%75%53%40%34%30%28%29%62%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rio Brilhante

In Rio Brilhante in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Rio Brilhante.

Maximum UV Index Levels in Rio Brilhante for December

The chart shows the monthly maximum UV Index (UVI) for Rio Brilhante 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 Brilhante typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151513118781011141416
Data source: Rio Brilhante 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 Brilhante Compares to Other Months

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

This table compares monthly weather conditions in Rio Brilhante, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)144 mm (5.7 inches)87%extreme
February Weather26°C (80°F)127 mm (5.0 inches)85%extreme
March Weather27°C (80°F)117 mm (4.6 inches)85%extreme
April Weather24°C (76°F)64 mm (2.5 inches)75%extreme
May Weather22°C (71°F)62 mm (2.4 inches)52%very high
June Weather21°C (69°F)47 mm (1.9 inches)40%high
July Weather20°C (68°F)13 mm (0.5 inches)34%very high
August Weather22°C (72°F)72 mm (2.8 inches)30%very high
September Weather26°C (79°F)38 mm (1.5 inches)28%extreme
October Weather26°C (80°F)133 mm (5.2 inches)29%extreme
November Weather26°C (80°F)117 mm (4.6 inches)62%extreme
December Weather27°C (81°F)150 mm (5.9 inches)81%extreme

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