nomadseason

December Weather in Caieiras, Brazil

Last updated: August 22, 2025

In December, the average temperature in Caieiras, Brazil hovers around 22°C (72°F). With a comfortable minimum of 12°C (53°F) and a peak reaching 34°C (93°F), you'll experience a range of warm weather. However, be prepared for some rain, as 166 mm (6.5 in) of precipitation falls over 20 days, and the air carries an average humidity of 80%. Make sure to pack accordingly for your visit!

December Temperature in Caieiras

In December, in Caieiras, the average temperature is 22°C (72°F). Maximums can reach 34°C (93°F) and minimums can drop as low as 12°C (53°F). This temperature range makes Caieiras a pleasant destination for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates December temperature patterns in Caieiras, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caieiras, 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 (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec737272686464616369706972
Data source: Temperature data for Caieiras generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Caieiras

In Caieiras in December, the precipitation amount is 166 mm (6.5 in) over the course of 20 days.

December Precipitation Trends in Caieiras

The chart displays monthly precipitation patterns in Caieiras, 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 Caieiras, December typically receives around 166 mm (6.5 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec204191147634843195544125142166
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Caieiras

In Caieiras 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 Caieiras

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

In Caieiras 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 Caieiras.

Maximum UV Index Levels in Caieiras for December

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

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

This table compares monthly weather conditions in Caieiras, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)204 mm (8.0 inches)88%extreme
February Weather22°C (73°F)191 mm (7.5 inches)88%extreme
March Weather22°C (73°F)147 mm (5.8 inches)87%extreme
April Weather20°C (69°F)63 mm (2.5 inches)84%extreme
May Weather18°C (64°F)47 mm (1.9 inches)79%very high
June Weather18°C (64°F)43 mm (1.7 inches)77%high
July Weather16°C (62°F)19 mm (0.7 inches)72%high
August Weather17°C (63°F)55 mm (2.2 inches)65%very high
September Weather20°C (69°F)44 mm (1.7 inches)58%extreme
October Weather21°C (70°F)125 mm (4.9 inches)50%extreme
November Weather21°C (69°F)142 mm (5.6 inches)75%extreme
December Weather22°C (72°F)166 mm (6.5 inches)80%extreme

Compare Caieiras's Climate with Cities Worldwide