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December Weather in Portao, Brazil

Last updated: August 22, 2025

In December, the average temperature in Portao, Brazil is a pleasant 24°C (75°F). You're likely to experience a cool dip of 11°C (51°F) at night, while daytime highs can soar up to 38°C (100°F). With an average precipitation of 91 mm (3.6 in) spread across 9 days, and a high humidity level of 87%, it’s wise to stay hydrated and be prepared for occasional rain showers.

December Temperature in Portao

In December in Portao, the average temperature is 24°C (75°F). Maximums can reach 38°C (100°F), while minimums can drop as low as 11°C (51°F). This makes it an ideal time for travelers who enjoy warm weather but should be prepared for a range of temperatures.

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

The chart illustrates December temperature patterns in Portao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portao, December typically has an average temperature of 24°C (75°F), with highs reaching up to 38°C (100°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec777673696360586065687074
Data source: Temperature data for Portao 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 Portao

In Portao in December, the precipitation amount is 91 mm (3.6 in) spread over 9 days.

December Precipitation Trends in Portao

The chart displays monthly precipitation patterns in Portao, 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 Portao, December typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec123116115801601231287817315812991
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Portao

In Portao in December, humidity is 87%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky embrace that clings to your skin, making outdoor activities feel heavier and more exhausting, and the air thickens, leaving you longing for shade and refreshing breezes as you navigate your adventures.

December Average Humidity in Portao

This chart illustrates the average monthly humidity levels in Portao, 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 Portao is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%77%79%83%88%86%82%77%80%84%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Portao

In Portao 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 Portao, you can check here.

Maximum UV Index Levels in Portao for December

The chart shows the monthly maximum UV Index (UVI) for Portao 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 Portao typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1413121065579121314
Data source: Portao 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 Portao Compares to Other Months

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

This table compares monthly weather conditions in Portao, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)123 mm (4.8 inches)80%extreme
February Weather24°C (76°F)116 mm (4.6 inches)77%extreme
March Weather23°C (73°F)115 mm (4.5 inches)79%extreme
April Weather21°C (69°F)79 mm (3.1 inches)83%very high
May Weather17°C (63°F)160 mm (6.3 inches)88%high
June Weather15°C (60°F)123 mm (4.8 inches)86%moderate
July Weather14°C (58°F)128 mm (5.0 inches)82%moderate
August Weather16°C (60°F)78 mm (3.1 inches)77%high
September Weather18°C (65°F)173 mm (6.8 inches)80%very high
October Weather20°C (68°F)158 mm (6.2 inches)84%extreme
November Weather21°C (71°F)129 mm (5.1 inches)83%extreme
December Weather24°C (75°F)91 mm (3.6 inches)87%extreme

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