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December Weather in Rio Formoso, Brazil

Last updated: August 22, 2025

In Rio Formoso, Brazil, the average temperature in December is a warm 27°C (81°F). Temperatures can dip to a comfortable 21°C (71°F) at night, while daytime highs can reach up to a sizzling 33°C (92°F). Expect a precipitation amount of around 46 mm (1.8 in) spread over 18 days, contributing to an average humidity of 72%, perfect for those who enjoy a tropical atmosphere.

December Temperature in Rio Formoso

In December in Rio Formoso, the average temperature is 27°C (81°F). Maximums can reach 33°C (92°F) and minimums can be as low as 21°C (71°F). This pleasant climate makes Rio Formoso an ideal destination for travelers looking to enjoy warm weather and outdoor activities.

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

The chart illustrates December temperature patterns in Rio Formoso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Formoso, December typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (92°F) and lows dropping to around 21°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec818181807876757576788080
Data source: Temperature data for Rio Formoso 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 Formoso

In Rio Formoso, in December, the precipitation amount is 46 mm (1.8 in) over the course of 18 days.

December Precipitation Trends in Rio Formoso

The chart displays monthly precipitation patterns in Rio Formoso, 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 Formoso, December typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec53671121141321501299160434546
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rio Formoso

In Rio Formoso in December humidity is 72%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, damp blanket, making travel a bit uncomfortable as you navigate through the thick, sticky air.

December Average Humidity in Rio Formoso

This chart illustrates the average monthly humidity levels in Rio Formoso, 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 Formoso is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%87%88%89%90%89%86%84%79%74%71%72%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rio Formoso

In Rio Formoso 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 Formoso, you can check here.

Maximum UV Index Levels in Rio Formoso for December

The chart shows the monthly maximum UV Index (UVI) for Rio Formoso 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 Formoso typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141414141211111213131414
Data source: Rio Formoso 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 Formoso Compares to Other Months

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

This table compares monthly weather conditions in Rio Formoso, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)53 mm (2.1 inches)84%extreme
February Weather27°C (81°F)67 mm (2.6 inches)87%extreme
March Weather27°C (81°F)112 mm (4.4 inches)88%extreme
April Weather26°C (80°F)114 mm (4.5 inches)89%extreme
May Weather26°C (78°F)132 mm (5.2 inches)90%extreme
June Weather25°C (77°F)150 mm (5.9 inches)89%extreme
July Weather24°C (75°F)129 mm (5.1 inches)86%extreme
August Weather24°C (75°F)91 mm (3.6 inches)84%extreme
September Weather25°C (77°F)60 mm (2.4 inches)79%extreme
October Weather26°C (79°F)43 mm (1.7 inches)74%extreme
November Weather27°C (80°F)45 mm (1.8 inches)71%extreme
December Weather27°C (81°F)46 mm (1.8 inches)72%extreme

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