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December Weather in Rio Casca, Brazil

Last updated: August 22, 2025

In Rio Casca, Brazil, the average temperature in December is a pleasant 25°C (76°F). Expect a range where the minimum can dip to 15°C (60°F) and the maximum can rise to 35°C (95°F). Be prepared for a fair amount of rain, with 163 mm (6.4 in) of precipitation spread over 15 days. The air is notably humid, with an average humidity level of 68%, adding to the unique charm of the season.

December Temperature in Rio Casca

In December in Rio Casca, the average temperature is a pleasant 25°C (76°F). Maximums can reach up to 35°C (95°F), while minimums can drop to as low as 15°C (60°F). This variation makes it an ideal time for travelers to enjoy outdoor activities while still having the option for cooler evenings.

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

The chart illustrates December temperature patterns in Rio Casca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Casca, December typically has an average temperature of 25°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec787777747069676873757576
Data source: Temperature data for Rio Casca 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 Casca

In Rio Casca in December, the total precipitation amount is 163 mm (6.4 in) spread over 15 days.

December Precipitation Trends in Rio Casca

The chart displays monthly precipitation patterns in Rio Casca, 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 Casca, December typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec981901215739741821117155163
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rio Casca

In Rio Casca in December, humidity is 68%. With an average temperature of 25°C (76°F), this humidity feels like a warm embrace, making travel invigorating yet slightly sweaty, prompting frequent breaks in the shade and an appreciation for refreshing drinks.

December Average Humidity in Rio Casca

This chart illustrates the average monthly humidity levels in Rio Casca, 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 Casca is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%85%88%86%82%82%77%72%63%48%61%68%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rio Casca

In Rio Casca 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 Rio Casca.

Maximum UV Index Levels in Rio Casca for December

The chart shows the monthly maximum UV Index (UVI) for Rio Casca 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 Casca typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161514129781012131416
Data source: Rio Casca 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 Casca Compares to Other Months

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

This table compares monthly weather conditions in Rio Casca, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)98 mm (3.9 inches)83%extreme
February Weather25°C (77°F)190 mm (7.5 inches)85%extreme
March Weather25°C (77°F)121 mm (4.8 inches)87%extreme
April Weather23°C (74°F)57 mm (2.3 inches)86%extreme
May Weather21°C (70°F)39 mm (1.5 inches)82%very high
June Weather20°C (69°F)7 mm (0.3 inches)82%high
July Weather19°C (67°F)4 mm (0.1 inches)77%very high
August Weather20°C (69°F)18 mm (0.7 inches)72%very high
September Weather23°C (74°F)21 mm (0.8 inches)63%extreme
October Weather24°C (76°F)116 mm (4.6 inches)48%extreme
November Weather24°C (75°F)155 mm (6.1 inches)61%extreme
December Weather25°C (76°F)163 mm (6.4 inches)68%extreme

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