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December Weather in Cacoal, Brazil

Last updated: August 22, 2025

In December, the average temperature in Cacoal, Brazil hovers around 25°C (78°F), with minimums dipping to 21°C (71°F) and maximums soaring to 34°C (93°F). This month also sees an average precipitation of 284 mm (11.2 in) spread over 29 days, contributing to an average humidity level of 83%.

December Temperature in Cacoal

In December in Cacoal, the average temperature is 25°C (78°F). The maximum can reach 34°C (93°F) and the minimum can be as low as 21°C (71°F). This mild climate makes it an ideal destination for travelers seeking comfortable weather for outdoor activities.

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

The chart illustrates December temperature patterns in Cacoal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cacoal, December typically has an average temperature of 25°C (78°F), with highs reaching up to 34°C (93°F) and lows dropping to around 21°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec787778787777778082807978
Data source: Temperature data for Cacoal 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 Cacoal

In Cacoal in December, the total precipitation amounts to 284 mm (11.2 in) spread over 29 days.

December Precipitation Trends in Cacoal

The chart displays monthly precipitation patterns in Cacoal, 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 Cacoal, December typically receives around 284 mm (11.2 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec222330279164701412052122300284
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cacoal

In Cacoal in December, humidity is 83%. With an average temperature of 25°C (78°F), this humidity feels like stepping into a warm, damp embrace, making travel sticky and exhausting, as each movement can leave you drenched in sweat.

December Average Humidity in Cacoal

This chart illustrates the average monthly humidity levels in Cacoal, 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 Cacoal is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%88%89%82%60%41%30%24%29%62%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cacoal

In Cacoal in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Cacoal.

Maximum UV Index Levels in Cacoal for December

The chart shows the monthly maximum UV Index (UVI) for Cacoal 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 Cacoal typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151616151110101112141515
Data source: Cacoal 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 Cacoal Compares to Other Months

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

This table compares monthly weather conditions in Cacoal, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)222 mm (8.7 inches)88%extreme
February Weather25°C (78°F)330 mm (13.0 inches)87%extreme
March Weather25°C (78°F)279 mm (11.0 inches)88%extreme
April Weather26°C (78°F)163 mm (6.4 inches)89%extreme
May Weather25°C (77°F)70 mm (2.8 inches)82%extreme
June Weather25°C (77°F)14 mm (0.5 inches)60%very high
July Weather25°C (77°F)1 mm (0.0 inches)41%very high
August Weather27°C (80°F)20 mm (0.8 inches)30%extreme
September Weather28°C (82°F)52 mm (2.0 inches)24%extreme
October Weather27°C (81°F)121 mm (4.8 inches)29%extreme
November Weather26°C (79°F)300 mm (11.8 inches)62%extreme
December Weather25°C (78°F)284 mm (11.2 inches)83%extreme

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