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December Weather in Cosmopolis, Brazil

Last updated: August 22, 2025

In Cosmopolis, Brazil, the average temperature in December hovers around 25°C (77°F), with minimums dipping to 14°C (57°F) and soaring highs of 37°C (99°F). Expect 137 mm (5.4 in) of precipitation over 16 days, accompanied by an average humidity of 80%. Stay prepared for a warm and slightly rainy month!

December Temperature in Cosmopolis

In December in Cosmopolis, the average temperature is 25°C (77°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 14°C (57°F). This makes it an ideal time for travelers seeking warm weather with comfortable cool evenings.

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

The chart illustrates December temperature patterns in Cosmopolis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cosmopolis, December typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec777676736867666874757576
Data source: Temperature data for Cosmopolis 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 Cosmopolis

In Cosmopolis in December, the precipitation amount is 137 mm (5.4 in) over the course of 16 days.

December Precipitation Trends in Cosmopolis

The chart displays monthly precipitation patterns in Cosmopolis, 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 Cosmopolis, December typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec19617310354412894435103139137
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cosmopolis

In Cosmopolis in December humidity is 80%. With an average temperature of 25°C (77°F), this humidity feels like traveling through a warm, tropical rainforest where the air is thick and steamy, making even the simplest stroll feel like a workout.

December Average Humidity in Cosmopolis

This chart illustrates the average monthly humidity levels in Cosmopolis, 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 Cosmopolis 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 Cosmopolis

In Cosmopolis 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 Cosmopolis.

Maximum UV Index Levels in Cosmopolis for December

The chart shows the monthly maximum UV Index (UVI) for Cosmopolis 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 Cosmopolis typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16161311867911131416
Data source: Cosmopolis 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 Cosmopolis Compares to Other Months

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

This table compares monthly weather conditions in Cosmopolis, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)196 mm (7.7 inches)88%extreme
February Weather25°C (77°F)173 mm (6.8 inches)88%extreme
March Weather25°C (77°F)103 mm (4.1 inches)87%extreme
April Weather23°C (73°F)54 mm (2.1 inches)84%extreme
May Weather20°C (68°F)40 mm (1.6 inches)79%very high
June Weather20°C (67°F)28 mm (1.1 inches)77%high
July Weather19°C (66°F)9 mm (0.3 inches)72%high
August Weather20°C (68°F)44 mm (1.7 inches)65%very high
September Weather24°C (75°F)35 mm (1.4 inches)58%extreme
October Weather24°C (75°F)103 mm (4.1 inches)50%extreme
November Weather24°C (75°F)139 mm (5.5 inches)75%extreme
December Weather25°C (77°F)137 mm (5.4 inches)80%extreme

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