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December Weather in Arroio dos Ratos, Brazil

Last updated: August 22, 2025

In December, the average temperature in Arroio dos Ratos, Brazil reaches a pleasant 24°C (75°F). Expect a range where it can drop to a cool 12°C (54°F) or rise as high as 38°C (100°F). The region experiences a total precipitation of 64 mm (2.5 in) over 8 days, contributing to an average humidity of 84%, creating a lush and vibrant atmosphere.

December Temperature in Arroio dos Ratos

In December in Arroio dos Ratos, the average temperature is 24°C (75°F). The maximum can reach 38°C (100°F), while the minimum can drop as low as 12°C (54°F). Travelers should be prepared for warm days and cooler evenings, making it ideal for a variety of activities.

December Weather in Arroio dos Ratos: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Arroio dos Ratos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arroio dos Ratos, 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 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec787774706359576064687175
Data source: Temperature data for Arroio dos Ratos 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 Arroio dos Ratos

In Arroio dos Ratos in December, the precipitation amount is 64 mm (2.5 in) over the course of 8 days.

December Precipitation Trends in Arroio dos Ratos

The chart displays monthly precipitation patterns in Arroio dos Ratos, 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 Arroio dos Ratos, December typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8591102761601171237615113910864
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Arroio dos Ratos

In Arroio dos Ratos in December humidity is 84%. With an average temperature of 24°C (75°F), this humidity feels like a warm, tropical embrace, making it essential for travelers to stay hydrated and plan outdoor activities for early mornings or late afternoons when the heat is more bearable.

December Average Humidity in Arroio dos Ratos

This chart illustrates the average monthly humidity levels in Arroio dos Ratos, 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 Arroio dos Ratos is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%79%79%82%87%85%82%81%84%85%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Arroio dos Ratos

In Arroio dos Ratos 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 Arroio dos Ratos, you can check here.

Maximum UV Index Levels in Arroio dos Ratos for December

The chart shows the monthly maximum UV Index (UVI) for Arroio dos Ratos 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 Arroio dos Ratos typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141312964579121314
Data source: Arroio dos Ratos 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 Arroio dos Ratos Compares to Other Months

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

This table compares monthly weather conditions in Arroio dos Ratos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)85 mm (3.3 inches)77%extreme
February Weather25°C (77°F)91 mm (3.6 inches)79%extreme
March Weather23°C (74°F)102 mm (4.0 inches)79%extreme
April Weather21°C (70°F)76 mm (3.0 inches)82%very high
May Weather17°C (63°F)160 mm (6.3 inches)87%high
June Weather15°C (60°F)117 mm (4.6 inches)85%moderate
July Weather14°C (57°F)123 mm (4.9 inches)82%moderate
August Weather15°C (60°F)76 mm (3.0 inches)81%high
September Weather18°C (65°F)151 mm (6.0 inches)84%very high
October Weather20°C (68°F)139 mm (5.5 inches)85%extreme
November Weather22°C (71°F)108 mm (4.3 inches)82%extreme
December Weather24°C (75°F)64 mm (2.5 inches)84%extreme

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