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December Weather in Cotia, Brazil

Last updated: August 22, 2025

In December, the average temperature in Cotia, Brazil is a pleasant 22°C (72°F). You'll experience a minimum of 12°C (54°F) and a maximum of 34°C (93°F), providing a broad range of weather options. However, be prepared for some rain, as 149 mm (5.9 in) of precipitation usually occurs over 20 days. With an average humidity of 80%, expect a tropical feel to the atmosphere!

December Temperature in Cotia

In December in Cotia, the average temperature is 22°C (72°F). The maximum can reach 34°C (93°F), and the minimum can be as low as 12°C (54°F). This pleasant climate makes it an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates December temperature patterns in Cotia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cotia, December typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (93°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec737272686464626369696972
Data source: Temperature data for Cotia 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 Cotia

In Cotia in December, the precipitation amount reaches 149 mm (5.9 in) over the course of 20 days.

December Precipitation Trends in Cotia

The chart displays monthly precipitation patterns in Cotia, 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 Cotia, December typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec176159129544646245538115119149
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cotia

In Cotia in December humidity is 80%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket that can quickly sap your energy while traveling, making you feel sticky and uncomfortable if you're not prepared.

December Average Humidity in Cotia

This chart illustrates the average monthly humidity levels in Cotia, 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 Cotia is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%84%79%77%72%65%58%50%75%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cotia

In Cotia 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 Cotia.

Maximum UV Index Levels in Cotia for December

The chart shows the monthly maximum UV Index (UVI) for Cotia 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 Cotia typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16151311867911131516
Data source: Cotia 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 Cotia Compares to Other Months

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

This table compares monthly weather conditions in Cotia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)175 mm (6.9 inches)88%extreme
February Weather22°C (73°F)159 mm (6.3 inches)88%extreme
March Weather22°C (73°F)129 mm (5.1 inches)87%extreme
April Weather20°C (69°F)54 mm (2.1 inches)84%extreme
May Weather18°C (65°F)46 mm (1.8 inches)79%very high
June Weather18°C (64°F)46 mm (1.8 inches)77%high
July Weather17°C (62°F)24 mm (0.9 inches)72%high
August Weather17°C (63°F)55 mm (2.2 inches)65%very high
September Weather20°C (69°F)38 mm (1.5 inches)58%extreme
October Weather21°C (70°F)115 mm (4.5 inches)50%extreme
November Weather21°C (69°F)119 mm (4.7 inches)75%extreme
December Weather22°C (72°F)149 mm (5.9 inches)80%extreme

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